Casio 5240 User Manual

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Operation Guide 5240

About This Manual

Operations are performed using the watch’s crown, and
the three buttons indicated by the letters A, B and C in
this manual.

Hands and Indicators



E-2

To unlock the crown

Rotate the crown so the groove aligns with Mark 1.

To pull out, rotate, or push the crown in

Important!

x

Before performing any of these operations, fi rst unlock the crown.

The illustrations below show the different crown operations.

Pull out Rotate Push in

When rotating the crown to move the hands of the watch, you can use the operations
described below to move the hands at high speed. There are two high-speed hand
movement speeds. High-speed 2 is the fastest.

E-4

Hour Hand
Second Hand
Minute Hand
Upper Dial Hand: Indicates a time, in 24-hour format,

Lower Dial Hand: Indicates the current mode.
Day Indicator

This User’s Guide uses numbers shown above to identify
watch hands and indicator.

depending on the current mode.

Congratulations upon your selection of this CASIO watch.

Note that the product illustrations in this manual are intended for reference only, and so

x

the actual product may appear somewhat different than depicted by an illustration.

This watch does not have a city code that corresponds to the UTC offset of –3.5
hours. Because of this, the radio-controlled atomic timekeeping function will not
display the correct time for Newfoundland, Canada.

Note that CASIO COMPUTER CO., LTD. assumes no responsibility for any
damage or loss suffered by you or any third party arising through the use of this
product or its malfunction.

Using the Crown

This watch has a lock-type crown.

Important!

x

You should normally have the crown locked during normal daily use. Leaving the crown
unlocked creates the risk of unintended operations or even damage due to impact.

To lock the crown

ENGLISH

Mark 1

Groove

W

Mark 2

V

High-speed 1 High-speed 2 High-speed Cancel

With the crown pulled out,
rotate it rapidly away from
you three times.

Note

x

If you do not perform any operation for more than two minutes after pulling out the
crown, crown operations will become disabled automatically. If this happens, push
the crown back in and then pull it out again to re-enable crown operations.
You can use high-speed hand movement when confi guring time settings in the

x

Timekeeping Mode, Alarm Mode, or Countdown Timer Mode.
High-speed hand movement is forward only. There is no high-speed backward x
hand movement.

Push the crown back in (see “To pull out, rotate, or push the 1.
crown in” below).

Note that attempting to lock the crown when it is not

x

pushed in can cause unexpected watch operation.

Rotate the crown so the groove is aligned with Mark 1.2.
While pushing in on the crown (a), rotate it to the right (b) so 3.

the groove aligns with Mark 2.
Gently pull on the crown to make sure it is securely locked 4.

and does not come out.

After starting the High­speed 1 operation, rotate
the crown rapidly away
from you three more times.

Rotate the crown towards
you or press any button.

E-1

E-3

E-5

Things to check before using the watch

1. Hold down C at least two seconds to enter the Timekeeping Mode, and

then observe the movement of the

Is the x Second Hand moving smoothly at one-second intervals?

Is the x Second Hand moving at
two-second intervals or is it stopped
completely?

Power is low. Charge the watch by
placing it in a location where it is
exposed to light. For details, see
“Charging the Watch” (page E-12).

E-6

NO

YES

Second Hand.

The watch is charged. For details
about charging, see “Charging
the Watch” (page E-12).

Go to step 2.

YES

NEXT

Contents

E-2 About This Manual

E-3 Using the Crown

E-3 To lock the crown
E-4 To unlock the crown
E-4 To pull out, rotate, or push the crown in

E-6 Things to check before using the watch

E-12 Charging the Watch

E-17 To recover from the sleep state

E-18 Radio Controlled Atomic Timekeeping

E-23 To get ready for a receive operation
E-26 To perform manual receive
E-27 To check the result of the latest receive operation
E-28 To turn auto receive on and off

E-8

2. Check the Home City.

Use the procedure under “To confi gure Home City settings” (page E-34) to confi gure
your Home City.

Important!

Proper time calibration signal reception depends on correct Home City, time, and
day settings in the Timekeeping Mode. Make sure you confi gure these settings
correctly.

3. Set the current time.

x To set the time using a time calibration signal

See “To get ready for a receive operation” (page E-23).

x To set the time manually

See “Confi guring Current Time and Day Settings Manually” (page E-39).

The watch is now ready for use.

For details about the watch’s radio controlled timekeeping feature, see “Radio x
Controlled Atomic Timekeeping” (page E-18).

E-30 Mode Reference Guide

E-31 To determine the watch’s current mode
E-31 To return to the Timekeeping Mode from any other mode
E-32 To select a mode

E-33 Timekeeping

E-34 Confi guring Home City Settings

E-34 To confi gure Home City settings
E-37 To switch between standard time and summer time manually

E-39 Confi guring Current Time and Day Settings Manually

E-39 To change the current time setting manually
E-42 To change the current day setting manually

E-46 Thermometer

E-47 To take a temperature reading
E-48 To switch a temperature reading unit between Celsius (°C) and

Fahrenheit (°F)

E-7

E-9

Operation Guide 5240

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x

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E-52 Temperature Reading Precautions

E-53 Checking the Current Time in a Different Time Zone

E-54 To view the time in another time zone
E-57 To swap your Home City and World Time City

E-58 Using the Stopwatch

E-59 To enter and exit the Stopwatch Mode
E-59 To perform an elapsed time operation
E-59 To perform fl yback timing

E-61 Using the Countdown Timer

E-62 To specify the countdown start time
E-63 To perform a countdown timer operation
E-63 To stop the alarm

E-64 Using the Alarm

E-65 To change the alarm time setting
E-67 To turn the alarm on or off

E-10

Charging the Watch

The face of the watch is a solar panel that generates power from light. The generated
power charges a built-in rechargeable battery, which powers watch operations. The
watch charges whenever it is exposed to light.

Charging Guide

E-12

Low Power

Moves at two-second
intervals.

E-14

Whenever you are not
wearing the watch, be sure
to leave it in a location
where it is exposed to light.

Best charging

x

performance is achieved
by exposing the watch to
light that is as strong as
possible.

Low power conditions are indicated by the movement of
the

Second Hand in the Timekeeping Mode.

If the x

Second Hand is moving normally at one-second

intervals, power is at Level 1.



If the

x

Second Hand is moving at two-second intervals,

power is at Level 2, which is quite low. Expose the watch
to light as soon as possible so it can charge.

Low Battery Alert (Hand Movement and Function
Status)

Level Hand Movement Function Status

1 Normal. All functions enabled

xx Second Hand moves at

2

two-second intervals.

3

xx Second Hand stopped.

When wearing the watch,
makes sure that its face is
not blocked from light by
the sleeve of your clothing.

The watch may enter a

x

sleep state (page E-17)
if its face is blocked by
your sleeve even only
partially.

Beeper and time
calibration signal
reception disabled.

All functions disabled

E-67 To stop the alarm

E-68 Adjusting Home Positions

E-70 To adjust home positions

E-72 Troubleshooting

E-82 Specifi cations

E-11

Warning!
Leaving the watch in bright light for charging can cause it to become quite hot.
Take care when handling the watch to avoid burn injury. The watch can become
particularly hot when exposed to the following conditions for long periods.

x

On the dashboard of a car parked in direct sunlight
Too close to an incandescent lamp x
Under direct sunlight x

Important!

x

Keep the watch in an area normally exposed to bright light when storing it for long
periods. This helps to ensure that power does not run down.

x

Storing the watch for long periods in an area where there is no light or wearing it in
such a way that it is blocked from exposure to light can cause power to run down.
Make sure that the watch is exposed to bright light whenever possible.

Checking the Current Power Level

Certain functions will be disabled when the power level is low. If the power level is
low, leave the watch in a location where its face (solar panel) is exposed to light.

When power drops to Level 3, all settings (including timekeeping) will be cleared. x
Recharging the battery will reset all settings to their initial factory defaults.
When the watch is at Level 3, exposing it to light for a while will cause the x
Hand to move to the position of second 57. This indicates that charging has started.

Power Recovery Mode

The watch is designed to go into a power recovery mode that stops hand operation
temporarily whenever power suddenly drops below a certain level due to continuous
signal reception or other operations over a short period. Note that all operations are
disabled while the watch is in the power recovery mode.
The hands will move to the correct positions and the watch will resume normal
operation after power recovers (in about 15 minutes). Putting the watch in a location
where it is exposed to light will help power to recover sooner.

E-13

Second

E-15

Charging Times

Exposure Level (Brightness)

Outdoor sunlight (50,000 lux) 8 minutes 3 hours 28 hours

Window sunlight (10,000 lux) 30 minutes 7 hours 107 hours

Window sunlight on cloudy day
(5,000 lux)

Indoor fl uorescent lighting
(500 lux)

1 Approximate exposure each day to generate power for normal daily operation. *
2 Approximate exposure to take power up one level. *

The above times are for reference only. Actual times depend on lighting conditions.

x

For details about the operating time and daily operating conditions, see the “Power x
Supply” section of the Specifi cations (page E-84).

E-16

Daily

Operation *1

48 minutes 10 hours 173 hours

8 hours 114 hours – – –

Level Change *2

Level 3 Level 2 Level 1

Radio Controlled Atomic Timekeeping

This watch receives a time calibration signal and updates its time setting accordingly.
However, when using the watch outside of areas covered by time calibration signals,
you will have to adjust the settings manually as required. See “Confi guring Current
Time and Day Settings Manually” (page E-39) for more information.

This section explains how the watch updates its time settings when the city code
selected as the Home City is in Japan, North America, Europe, or China, and is one
that supports time calibration signal reception.

E-18

Power Saving

Power Saving enters a sleep state (second hand sleep or function sleep) whenever
the watch is left for a certain period in an area where it is dark.

Elapsed Time in Dark Operation

60 to 70 minutes
(second hand sleep)

6 or 7 days
(function sleep)

The watch will not enter a sleep state between 6:00 AM and 9:59 PM. If the watch is x
already in a sleep state when 6:00 AM arrives, however, it will remain there.

x

The watch will not enter a sleep state while it is in the Stopwatch Mode or
Countdown Timer Mode.

To recover from the sleep state

Move the watch to a well-lit area or press any button.

If your Home City Code setting is this:

LON (LONDON), PAR (PARIS), ATH (ATHENS)

HKG (HONG KONG) Shangqiu City (China)

TYO (TOKYO)

HNL (HONOLULU), ANC (ANCHORAGE),
LAX (LOS ANGELES), DEN (DENVER),
CHI (CHICAGO), NYC (NEW YORK)

Important!

x HNL (HONOLULU) and ANC (ANCHORAGE) are quite far

The areas covered by
from the calibration signal transmitters, so certain conditions may cause reception
problems.

xx Second Hand only stopped at 12 o’clock, all other functions

enabled

All functions, including analog timekeeping, disabled x
Internal timekeeping maintained x

The watch can receive the signal from
the transmitter located here:

Anthorn (England), Mainfl ingen
(Germany)

Fukushima (Japan), Fukuoka/Saga
(Japan)

Fort Collins, Colorado (United States)

E-17

E-19

Operation Guide 5240

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Approximate Reception Ranges

UK and German Signals North American Signal

Anthorn

500 kilometers

1,500 kilometers

Inside a
vehicle

Mainfl ingen

Near
household
appliances,
offi ce
equipment,
or a mobile
phone

Near a
construction
site, airport,
or other
sources of
electrical
noise

The Anthorn signal is receivable
within this area.

E-20

Signal reception may not be possible at the distances noted below during certain times x
of the year or day. Radio interference may also cause problems with reception.

Mainfl ingen (Germany) or Anthorn (England) transmitters: 500 kilometers

−

(310 miles)
Fort Collins (United States) transmitter: 600 miles (1,000 kilometers)

−

Fukushima or Fukuoka/Saga (Japan) transmitters: 500 kilometers (310 miles) −
Shangqiu (China) transmitter: 500 kilometers (310 miles) −

As of December 2010, China does not use Daylight Saving Time (DST). If China x
does go to the Daylight Saving Time system in the future, some functions of this
watch may no longer operate correctly.
Using this watch in a country covered by a time calibration signal that is different

x

from the countries it supports may result in incorrect time indication due to local
application of daylight saving time (summer time), etc.

E-22

Signal reception may be diffi cult or even impossible under the conditions x
described below.

Inside or
among
buildings

2,000 miles
(3,000 kilometers)

600 miles
(1,000 kilometers)

Fort Collins

Near
high-tension
power lines

Among
or behind
mountains

Japanese Signals Chinese Signal

Fukushima

500 kilometers

Fukuoka/Saga

1,000 kilometers

To get ready for a receive operation

Confi rm that the watch is in the Timekeeping Mode. If it isn’t, hold down 1. C for at
least two seconds to enter the Timekeeping Mode.

Place the watch in a location where signal reception is good.2.

12 o’clock

or

What you should do next depends on whether you are using Auto Receive or 3.
Manual Receive.

Auto Receive: Leave the watch over night in the location you selected in step 2.

x

See “Auto Receive” on page E-25 for details.

x

Manual Receive: Perform the operation under “To perform manual receive” on
page E-26.

Auto Receive

x

With Auto Receive, the watch performs the receive operation each day
automatically up to six times (up to fi ve times for the Chinese calibration signal)
between the hours of midnight and 5 a.m. (according to the Timekeeping Mode
time). When any receive operation is successful, none of the other receive
operations for that day are performed.
When a calibration time is reached, the watch will perform the receive operation

x

only if it is in the Timekeeping Mode. The receive operation is not performed if a
calibration time is reached while you are confi guring settings.

Position the watch as shown in the x
nearby illustration, with 12 o’clock
pointed towards a window. Make
sure there are no metal objects
nearby.
Signal reception normally is better

x

at night.
The receive operation takes from x
two to seven minutes, but in some
cases it can take as long as
14 minutes. Take care that you do
not perform any button operation or
move the watch during this time.

Changchun500 kilometers

1,500 kilometers

Beijing
Shangqiu
Shanghai
Chengdu
Hong Kong

E-21

E-23

E-24

To perform manual receive

In the Timekeeping Mode (page E-33), keep 1. B depressed (for about two seconds)

Second Hand goes through the following sequence.

as the

Moves to x Y (YES) or N (NO) to indicate the last signal reception result, then to
R (READY).

Second Hand indicates the operations the watch is currently performing.

The 2.

E-26

When the xx Second Hand is
pointed here:

R (READY)

W (WORK) Reception is in progress.



If signal reception is unstable, the x xx Second Hand may
move between W (WORK) and R (READY).
When the receive operation is successful, the watch

x

adjusts the time setting accordingly, and then resumes
regular timekeeping. It does not adjust the setting if the
operation failed.

It means this:

Watch is setting up for reception.

To turn auto receive on and off

Y (YES)

E-28

N (NO)

In the Timekeeping Mode, press 1. B. The
Hand will move to Y (YES) or N (NO) to indicate the last
calibration signal receive result.

Pull out the crown.2.

Second Hand will perform one full revolution and

The
then stop at the current on/off setting.

Rotate the crown to move the 3.



setting you want.

To turn on auto receive, select

x Y (YES).

To turn off auto receive, select x N (NO).

Push the crown back in to return to the Timekeeping 4.
Mode.

Second

Second Hand to the

Note

x

To interrupt a receive operation and return to the Timekeeping Mode, press any
button.

To check the result of the latest receive operation

In the Timekeeping Mode, press B. The
Hand will move to Y (YES) or N (NO) to indicate the last
calibration signal receive result.

The

xx Second Hand will move to Y (YES) if the latest

receive operation was successful, or N (NO) if it was not.



After about 10 seconds, regular timekeeping will resume.
Press

x B to return to regular timekeeping. The watch will

also return to regular timekeeping if you do not perform
any operation for about 10 seconds.

Note

xx Second Hand will indicate N (NO) if you have adjusted the time or day

The
setting manually since the latest receive operation.

Radio-controlled Atomic Timekeeping Precautions

x

Strong electrostatic charge can result in the wrong time setting.
Even if a receive operation is successful, certain conditions can cause the time x
setting to be off by up to one second.
The watch is designed to update its day setting automatically for the period from x
January 1, 2000 to December 31, 2099. Updating of the day setting by signal
reception will no longer be performed starting from January 1, 2100.

x

If you are in an area where signal reception is not possible, the watch keeps time
with the precision noted in “Specifi cations” (page E-82).
The receive operation is disabled under any of the following conditions. x

While power is at Level 2 or lower (page E-14) −
While the watch is in the power recovery mode (page E-15) −
While the watch is in the function sleep state (power saving, page E-17) −
While the watch is in the World Time Mode (page E-53) −
While a countdown timer operation is in progress (page E-63) −

A receive operation is cancelled if an alarm sounds while it is being performed. x

E-25

Second

E-27

E-29

Operation Guide 5240

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Mode Reference Guide

Your watch has fi ve “modes”. The mode you should select depends on what you want
to do.

To do this: Enter this mode: See:

Confi gure Home City and DST (daylight saving time) settings x
Perform a time calibration signal receive operation x
Change the Auto Receive on/off setting x
Confi gure time and day settings manually x
Measure temperature x

x

View the current time in one of 29 cities around the globe
Confi gure World Time City and summer time settings x
Swap the Home City and World Time City x

Use the stopwatch to measure elapsed time Stopwatch Mode E-58

Use the countdown timer

Set an alarm time x
Turn the alarm ON or OFF x

E-30

To select a mode

Each press of C will cycle between modes. The currently selected mode is indicated

Lower Dial Hand.

by the

Timekeeping Mode World Time Mode

C

Alarm Mode Countdown Timer Mode

E-32

C

C

Timekeeping Mode E-33

C

C

E-53
E-54
E-57

E-61

E-64
E-67

World Time Mode

Countdown Timer
Mode

Alarm Mode

Stopwatch Mode

Confi guring Home City Settings

The Home City is location where you will normally use the watch. You can choose
from a selection of city codes that represent 29 cities around the globe.

To confi gure Home City settings

Note

x

This watch does not have a city code that corresponds



TYO (TOKYO)

to Newfoundland.

Pull out the crown.1.

x

This will cause the
city code of the currently selected Home City.
This indicates the city code setting mode.

x

Second Hand to move to the

Selecting a Mode

With this watch, everything starts from the Timekeeping Mode.

To determine the watch’s current mode

Check what the
under “To select a mode” (page E-32).



To return to the Timekeeping Mode from any other
mode

Hold down C for at least two seconds.

Lower Dial Hand is indicating as shown

Timekeeping

To enter the Timekeeping Mode, hold down C at least two seconds.

Hands and Indicators

Hour Hand
Second Hand
Minute Hand



If you do not perform any operation with the crown for about two minutes after x
pulling it out, crown operations will become disabled and the hand will not move
if you rotate the crown. If this happens, push the crown back in and then pull it
out again.
For details about city codes, see the “City Code Table” at the back of this

x

manual.



Upper Dial Hand: Indicates the current hour in the

Lower Dial Hand: Points to the day of the week.
Day Indicator

Rotate the crown to move the 2.
code you want to select as your Home City.

Each time you select a city code, the

x

Minute Hand and n Day Indicator move to the

current time and day for that city code.

Push the crown back in to return to the Timekeeping 3.
Mode.

Home City time in 24-hour format.

Second Hand to the city

Hour Hand,

E-31

E-33

E-34

STD/DST Switching

You can select summer time or standard time independently for each city. The initial
default setting for all cities is AT (AUTO).
Normally you should use the AT (AUTO) setting because it automatically switches
between summer time and standard time. You should change the setting to STD
(standard time) or DST (summer time) in the following cases.

When using a time of a location that is not included in the watch’s list of 29 cities

−

When the preset AUTO standard time/summer time timing is incorrect for some −
reason

Daylight Saving Time (DST)

Daylight Saving Time (summer time) advances the time setting by one hour from
Standard Time. Remember that not all countries or even local areas use Daylight
Saving Time.

Note that you cannot switch between

x STD (standard time) and DST (daylight

saving time) while UTC* is selected as your Home City.

Coordinated Universal Time, the world-wide scientifi c standard of timekeeping. The *
reference point for UTC is Greenwich, England.

E-36

Hold down 2. A for about one second to cycle through the
summer time settings as shown below.

AA

AT (AUTO) STD DST

A

After the setting is way you want, push the crown back in.3.

E-38

To switch between standard time and summer time manually

Perform steps 1 and 2 under “To confi gure Home City settings” (page E-34).1.

x

Selecting a city code will cause the

Upper Dial Hand to move automatically to the current time for the selected

city code.
If you will use the watch in a city that is not included in the city code list, select a

x

city code that is in the same time zone as your city.
Displaying the Home City Settings screen will cause the

x

move to AT (auto switching), STD (standard time), or DST (daylight saving time).

The watch automatically switches between standard time and daylight

AT (AUTO)

saving time in accordance with its calendar.

STD The watch always shows standard time.

DST The watch always shows daylight saving time.

Hour Hand, c Minute Hand, and

Lower Dial Hand to

Confi guring Current Time and Day Settings Manually

You can confi gure current time and day settings manually when the watch is unable to
receive a time calibration signal.

To change the current time setting manually

Pull out the crown.1.



TYO (TOKYO)

This will cause the x
city code of the currently selected Home City.
If you do not perform any operation with the crown

x

for about two minutes after pulling it out, crown
operations will become disabled and the hand will
not move if you rotate the crown. If this happens,
push the crown back in and then pull it out again.

Second Hand to move to the

E-35

E-37

E-39

Operation Guide 5240

z

x

v

z
x
c
b

x

v

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x

c
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x

+

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n

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Change the Home City settings, if you want.2.

For details about these settings, see steps 2 and 3 x
under “To confi gure Home City settings” (page E-34).

Hold down 3. C for about one second until the watch



Home city/DST

beeps and the

x

This indicates the manual time setting mode.
In the following steps, each press of x C cycles
between settings as shown below.

C

Hour/Minute Hour

Second Hand moves to 12 o’clock.

C

Rotate the crown to adjust the time (hour and minute) setting.4.

x

See “Using the Crown” (page E-3) for information about high-speed hand
movement.
The xv Upper Dial Hand is synchronized with the z Hour Hand.
When adjusting the setting, check to make sure that the x
correctly indicates an a.m. time or p.m. time.
If you want to change the day setting at this time, press

x C and perform the

procedure starting from step 3 under “To change the current day setting
manually” (page E-42).

After the settings are the way you want, push the crown back in to return to the 5.
Timekeeping Mode.

x

This causes timekeeping to resume with the
12 o’clock.

CC

Year DayMonth

E-40

To change the current day setting manually

Pull out the crown.1.

This will cause the

x

code of the currently selected Home City.

Hold down 2. C for about one second until the watch
beeps and the x Second Hand moves to 12 o’clock.



x

This indicates the manual time setting mode.

Press 3. C twice. This will enter the day setting mode.

The xn Day Indicator will move slightly to indicate the
setting mode.

Rotate the crown to adjust the day setting.4.

E-42

Rotate the crown to adjust the year setting.8.

If you want to change the time setting at this time, press

x C and then perform

the procedure starting from step 4 under “To change the current time setting
manually” (page E-39).

9

0

1

2

3

CC

Second Hand to move to the city

00

10

90

Dec

Nov

Oct

Sep

Aug

Jul May

Jun

Setting the month

After the settings are the way you want, push the crown back in to return to the 9.
Timekeeping Mode.

This causes timekeeping to resume with the

x

12 o’clock.

Note

x

20

30

The watch’s built-in full automatic calendar makes allowances for different month
lengths and leap years. Once you set the day, there should be no reason to change
it except after you have the watch’s rechargeable battery replaced or after power
drops to Level 3.

Jan

Second Hand starting from

After the 5.

Day Indicator stops moving, press

C. This will enter the month setting mode.

Feb

The

xx Second Hand will move to the

currently selected month.

Rotate the crown to adjust the month setting.6.

Mar

Press 7. C. This will enter the year setting
mode.

xz Hour Hand will move to the number

The

Apr

that represents the tens digit of the year
and the

Minute Hand will move to the

number that represents the ones digit. The

Second Hand will move to 12 o’clock and

stop there.

Second Hand starting from

Upper Dial Hand

E-41

E-43

8

E-44

6

Year setting (ones digit)

4

57

80

Year setting (tens digit)

60

Thermometer

This watch uses a temperature sensor to take temperature readings.

You can select either Celsius (°C) or Fahrenheit (°F) as the temperature •
measurement unit (page E-48).

Example: 24°C

(tens digit)

E-46

Measurement unit: 1°C (or 2°F)
Measurement range*: –10 to 60°C (or 14 to 140°F)

If a reading produces a value that is outside the measurement range, the *

Hand,
If you have performed correction of the temperature reading (page E-49), canceling
the correction may cause a reading to be outside the measurement range.

To switch a temperature reading unit between Celsius (°C) and Fahrenheit (°F)

While the hands are indicating a temperature reading, pull out the crown.1.
Hold down 2. A for about two seconds.

•

This will toggle the temperature reading unit between Celsius (°C) and
Fahrenheit (°F), causing the z Hour Hand, x Second Hand, c Minute Hand,
and

Push the crown back in.3.

•

After about ten seconds, the watch will resume regular timekeeping.

°C (Above zero)2

2 (tens digit)



4 (ones digit)

Second Hand, c Minute Hand, and v Upper Dial Hand all point to 11.

Upper Dial Hand to move accordingly.

Hands and Indicators

Celsius (°C)

Hour Hand and v Upper Dial Hand:

Indicate the tens digit.

Second Hand: Indicates temperature is above

Minute Hand: Indicates the ones digit.
Lower Dial Hand: Points to the day of the

zero (+°C) or below zero (–°C).

week.

40

5070

E-45

Fahrenheit (°F)

Hour Hand and v Upper Dial Hand: Indicate the hundreds digit.
Second Hand: Indicates the ones digit.
Minute Hand: Indicates the tens digit.
Lower Dial Hand: Points to the day of the week.

To take a temperature reading

Enter the Timekeeping Mode (page E-32).1.
Press 2. A.

•

Second Hand and then the z Hour Hand, c Minute Hand, and

First the

Upper Dial Hand move to indicate the temperature reading.

• A again while the hands are indicating a temperature reading will take

Pressing
another reading.

• B or C.

To cancel an ongoing temperature measurement operation, press
About 10 seconds after the hands move to indicate a temperature reading, they •
will go back to regular timekeeping automatically.

E-47

Important!

x TYO (TOKYO) is selected as the Home City, the temperature unit is set

Hour

When
automatically to Celsius (°C). These settings cannot be changed.

x

If you do not perform any operation with the crown for about two minutes after
pulling it out, crown operations will become disabled and the watch hands will no
longer move when you rotate the crown. If this happens, push the crown back in
and then pull it out again.

Correcting the Temperature Reading

The temperature sensor of this watch is adjusted at the factory and so further
adjustment is not required by you. However, if you notice that the readings produced
by the watch are different from readings produced by another instrument, you can use
the procedure in this section to make corrections. You also can use this procedure to
clear a correction.

E-48

E-49

Operation Guide 5240

z

x

c
v

b

* B

@+ >

@

@

x

z

n

z

x

c

b
n

+

6B *

@ >

Important!

x

The watch will not be able to produce correct temperature readings if you make a
mistake during the correction procedure. Check to make sure that the value you
use for correction produces correct temperature readings.
Before performing the following procedure, remove the watch from your wrist and

x

leave it for about 20 or 30 minutes to allow the case temperature to become the
same as the air temperature.

While the hands are indicating a temperature reading, pull out the crown.1.

Rotate the crown to adjust the temperature setting. 2.
Holding down A and B at the same time will return the temperature reading to the
factory default setting.

Each rotation of the crown moves the hands by 1°C (2°F).

x

You can adjust the temperature reading within the range of –10 to 60°C (or 14 x
to 140°F).

E-50

Temperature Reading Precautions

Body temperature, direct sunlight, and humidity all have an effect on temperature
readings. To help ensure more accurate temperature readings, remove the watch
from your wrist, wipe it dry of any moisture, and place it in a well-ventilated location
not exposed to direct sunlight for about 20 to 30 minutes before taking temperature
readings.

E-52

Important!

x

Time calibration signal reception is disabled while the watch is in the World Time
Mode.

To view the time in another time zone

In the Timekeeping Mode, press 1. C once to enter the World Time Mode.

xb Lower Dial Hand will move to WT.

The
To select the UTC zone as your World Time, simply hold down x B for about three
seconds. No other operation is required.

Pull out the crown.2.

xx Second Hand points to the currently selected World Time city code.

The
The xb Lower Dial Hand will indicate AT (AUTO), STD (standard time) or DST
(daylight saving time), which indicates the current daylight saving time setting.
If you do not perform any operation with the crown for about two minutes after

x

pulling it out, crown operations will become disabled and the watch hands will no
longer move when you rotate the crown. If this happens, push the crown back in
and then pull it out again.

E-54

Important!

x A and B at the

To cancel a temperature reading correction setting, hold down
same time. The watch will beep.

Push the crown back in.3.

x

After about ten seconds, regular timekeeping will resume.

Important!

x

If you do not perform any operation with the crown for about two minutes after
pulling it out, crown operations will become disabled and the watch hands will no
longer move when you rotate the crown. If this happens, push the crown back in
and then pull it out again.

Checking the Current Time in a Different Time Zone

You can use World Time to view the current time in one of 29 time zones around the
globe. The currently selected city is called the “World Time City”.

NYC (NEW YORK)

Rotate the crown to move the 3.
as the World Time City.

Each time you select a city code, the

•

Dial Hand, and
code. For details about city codes, see the “City Code Table” at the back of this
manual.
If you think that the time indicated for the selected World Time City is not correct,

•

it probably means that there is something wrong with your Home City settings.
Use the procedure under “To confi gure Home City settings” (page E-34) to
correct the Home City settings.

Hold down 4. A for about one second to cycle through the summer time settings as
shown below.

AT (AUTO) STD DST

Hands and Indicators

Hour Hand and v Upper Dial Hand:

Indicate the hour of the current time in the World Time
City.

Second Hand:

Indicates the current World Time City for about three



seconds after the World Time mode is entered.

Minute Hand:

Indicates the current minute in the World Time City.

Lower Dial Hand: Points to WT.
Day Indicator

• A causes the x Second Hand to move to the

Pressing
current World Time City for about three seconds.

Second Hand to the city code you want to select

Day Indicator move to the current time and day for that city

Hour Hand, c Minute Hand, v Upper

AA

A

E-51

E-53

E-55

After selecting the city you want, push the crown back in to return to the World 5.
Time Mode.

Swapping your Home City and World Time City

You can use the procedure below to swap your Home City and World Time City. This
capability can come in handy when you frequently travel between two locations in
different time zones.

E-56

The following example shows what happens when the
Home City and World Time City are swapped while the
Home City originally is TYO (Tokyo) and the World Time
City is NYC (New York).



Before
swapping

After
swapping

Home City World Time City

Tokyo

10:08 p.m.

(Standard time)

New York
9:08 a.m.

(Daylight saving time)

New York
9:08 a.m.

(Daylight saving time)

Tokyo

10:08 p.m.

(Standard time)

Using the Stopwatch

You can use the stopwatch to measure elapsed times. A fl yback feature (page E-59)
lets you reset the stopwatch to zero without stopping time measurement.

Hands and Indicators

Hour Hand: Indicates the stopwatch minute count

(1 revolution = 60 minutes).

Second Hand: Indicates the 0.05-second count during



E-58

Minute Hand: Indicates the stopwatch seconds count.
Upper Dial Hand: Indicates the stopwatch minute count

Lower Dial Hand: Points to ST.

stopwatch operation.

(1 revolution = 120 minutes).

To swap your Home City and World Time City

In the World Time Mode, hold down A for about three
seconds until the watch beeps.

This indicates that your Home City and World Time City

x

have been swapped.



After swapping the Home City and World Time City, the x
watch will stay in the World Time Mode. The x Second
Hand will point to your new World Time City (TYO in this
example).

Note

If your current World Time City supports time calibration

x

signal reception, making it your Home City enables
calibration signal reception for that city.

To enter and exit the Stopwatch Mode

In the Timekeeping Mode, press C twice to enter the Stopwatch Mode.

xb Lower Dial Hand will move to ST.

The

To perform an elapsed time operation

A

Start Stop (Restart) (Stop) Zero Reset

To perform fl yback timing

Pressing B while an elapsed time operation is in progress performs zero reset and
immediately resumes timing from there. You can do this as many times as you want.

A

Start 1 Start 2 Start 3 Stop Zero Reset

An ongoing elapsed time measurement operation is not affected by pulling out the x
crown.

A A A B

B B

.....

A B

E-57

E-59

Operation Guide 5240

v

b

x

v

z
x

c

v

b

>*+B

@

c

*

+

@

z

x

c
b

*

+@ B>

x

The xx Second Hand, which indicates the 1/20 (0.05)-second count during
stopwatch operation, moves only 30 seconds after an elapsed time measurement
operation is started or restarted. After that, the

E-60

To specify the countdown start time

E-62

In the Timekeeping Mode, press 1. C three times to enter
the Countdown Timer Mode.

The

xb Lower Dial Hand will move to TR.

In the Countdown Timer Mode, pull out the crown. This 2.
enters the countdown start time setting mode.



x

If you do not perform any operation with the crown for
about two minutes after pulling it out, crown operations
will become disabled and the hand will not move if
you rotate the crown. If this happens, push the crown
back in and then pull it out again.

Rotate the crown to set the countdown start time.3.

x

The maximum countdown start time setting is
60 minutes. To set a countdown start time of
60 minutes, move the
See “Using the Crown” (page E-3) for information x
about high-speed hand movement.

Second Hand stops.

Minute Hand to 12 o’clock.

Using the Alarm

When the alarm is turned on, an alarm will sound for about 10 seconds each day
when the time in the Timekeeping Mode reaches the preset alarm time. This is true
even if the watch is not in the Timekeeping Mode.

Hands and Indicators

Hour Hand: Indicates the currently set alarm time hour.
Second Hand: Indicates the current alarm ON/OFF



Minute Hand: Indicates the currently set alarm time

Upper Dial Hand: Indicates the hour setting of the

Lower Dial Hand: Points to AL.

setting.

minute.

current alarm time in 24-hour format.

Using the Countdown Timer

The countdown timer can be confi gured within a range of one minute to 60 minutes.
An alarm sounds for about 10 seconds when the timer reaches zero.

Hands and Indicators

Hour Hand and v Upper Dial Hand:

Point to 12 o’clock.
Second Hand: Indicates countdown or elapsed



To perform a countdown timer operation

A

Start Stop Zero Reset

A time-up alert sounds for 10 seconds when the countdown reaches 0, and then x
the timer displays the start time.
The alarm will not sound if battery power is low. x
Pulling out the crown while a countdown is in progress will stop the countdown and x
enter the countdown start time setting mode.

Important!

x

Time calibration signal reception is disabled while the watch is in the Countdown
Timer Mode.

To stop the alarm

Press any button.

To change the alarm time setting

In the Timekeeping Mode, press 1. C four times to enter the Alarm Mode.

xb Lower Dial hand will move to AL.

The

Pull out the crown to enter the alarm setting mode.2.

x

If you do not perform any operation with the crown for about two minutes after
pulling it out, crown operations will become disabled and the watch hands will no
longer move when you rotate the crown. If this happens, push the crown back in
and then pull it out again.
You can toggle between the hour and minute setting mode, and the hour only

x

setting mode by pressing C.

Minute Hand: Indicates countdown or elapsed minutes.
Lower Dial Hand: Points to TR.

All hands move counterclockwise during a countdown. •

A B

Hour/Minute Hour

seconds.

C

E-61

E-63

E-64

Rotate the crown to set the alarm time.3.

The xz Hour Hand will also move.

x

See “Using the Crown” (page E-3) for information about high-speed hand
movement.

Press 4. C to switch to the hour setting mode.

xz Hour Hand will move slightly left and right to indicate the z Hour Hand

The
setting mode.

x

Check the 24-hour time indicated by the
setting is a.m. or p.m.

Rotate the crown to adjust the hour setting only.5.

x

See “Using the Crown” (page E-3) for information about high-speed hand
movement.

E-66

Upper Dial Hand to see if the current

Adjusting Home Positions

Strong magnetism or impact can cause the hands and/or day indicator setting to be
off, even if the watch is able to perform the time calibration signal receive operation.

Auto Home Position Adjustment

Auto correction of hand home positions corrects the hand position automatically.

Auto correction is performed in the Timekeeping Mode only. x
Auto correction corrects the positions of all hands. For the day Indicator, you must x
perform the manual adjustment procedure under “To adjust home positions” (page
E-70).
If the

x

Upper Dial Hand is 12 hours off of the current correct time, correct the

setting using the procedure under “To adjust home positions” (page E-70).
Auto correction of the

x

the night, while the watch is in the sleep state (page E-17).

E-68

Lower Dial Hand is performed once a day in the middle of

After the setting is the way you want, push the crown back in to exit the alarm 6.
setting mode.

The alarm always works based on the time kept in the Timekeeping Mode.

x

The watch will return to the Timekeeping Mode automatically if you do not x
perform any operation in the Alarm Mode for about two or three minutes.

To turn the alarm on or off

In the Alarm Mode, press A to toggle the alarm between on and off. The
Hand will indicate the current ON/OFF setting.

Note

The alarm will not sound if battery power is low. x
The alarm will not sound if the watch is in the Power Saving sleep state. x

To stop the alarm

Press any button.

Manual Home Position Adjustment

Perform the procedure in this section if auto home position adjustment is not possible
for some reason.

Hand home position adjustment is not required if the time and day settings are

x

correct.

Note

x

Any time after you enter the home position adjustment mode in step 2 of the
following procedure, you can return to the Timekeeping Mode by pushing the
crown back in. In this case, any adjustments you made before the watch returned
to the Timekeeping Mode will be applied.
If you do not perform any operation with the crown for about two minutes after

x

pulling it out, crown operations will become disabled and hands will not move if you
rotate the crown. If this happens, push the crown back in and then pull it out again.

E-65

Second

E-67

E-69

Operation Guide 5240

x

x
x

x

x

n

n

n

6

x

v

6

@>

To adjust home positions

Pull out the crown.1.

E-70

Hold down 2. B for at least fi ve seconds until the watch
beeps and the

Automatic home position adjustment of all of the x



hands (but not the n Day Indicator) will start.
If all hands are at 12 o’clock (the proper home hand x
home position), advance directly to step 3.
If the

x

is its home position, hold down A for about two
seconds to move it there.

Second Hand moves to 12 o’clock.

Upper Dial Hand is not pointing at 24, which

Troubleshooting

Hand Movement and Position

■ I lost track of what mode the watch is in.

Refer to “Mode Reference Guide” (page E-30). To return directly to the Timekeeping
Mode, hold down C at least two seconds.

■ The

Second Hand is moving at two-second intervals.

■ All the watch’s hands are stopped at 12 o’clock and none of the buttons work
(

Second Hand stopped at 57, 58, 59, or 00).

Power may be low. Expose the watch to light until the
normally, at one-second intervals (page E-14).

■ The hands of the watch suddenly start moving at high speed, even when I do
not perform any operation.

This could be due to any one of the following causes. In all cases, the hand movement
does not indicate malfunction, and should stop shortly.

The watch is recovering from a sleep state (page E-17).

x

E-72

The period when summer time is applied in the location where you are using the x
watch may be different from the period set for your currently selected Home City.
Use the procedure under “To switch between standard time and summer time
manually” (page E-37) to switch from AT (AUTO) to STD (for standard time) or DST
(for summer time).

■ The time and date settings are off.

This could indicate that the watch has been exposed to magnetism or strong impact,
which has caused problems with proper hand and day indicator alignment. Adjust the
watch’s hand and day indicator home position alignment (page E-68).

Second Hand starts moving

Press 3. C.

x

This enters the
adjustment mode.

Check the 4.



is its home position.

x 1 is not in the center of the n Day Indicator,

If the
rotate the crown to center it.
Rotating the crown three full consecutive turns

x

clockwise will cause the n Day Indicator to start
changing in a forward direction (increment).
To stop

x

Push the crown back in to return to the Timekeeping Mode.5.

This will cause the hands to return to their normal positions and resume regular

x

timekeeping. Wait until everything stops moving before performing any other
operation.

The time setting is being adjusted following a successful auto time calibration x
signal receive operation (page E-18).

■ Hands suddenly stop moving. Button operation also is disabled.

The watch may be in the power recovery mode (page E-15). Do not perform any
operation until the hands return to their normal positions (in about 15 minutes). The
hands should return to their correct positions when normal operation returns. To help
power recover, leave the watch in a location where it is exposed to light.

■ The current time setting is off by hours.

Your Home City setting may be wrong. Check your Home City setting and correct it,

x

if necessary (page E-34).

■ The current time setting is off by one hour.

If you are using the watch in an area where time calibration signal reception is x
possible, see “To confi gure Home City settings” (page E-34).

Sensor

Temperature measurement error occurs.■

This indicates that there is a problem with the sensor or the
watch’s internal circuitry, making sensor measurement and
value correction impossible.

If the error message appears during a measurement,

x

restart the measurement. If the error message appears
when you restart the measurement, it probably means
that there is a problem with the sensor or internal
circuitry.

Day Indicator home position

Day Indicator to confi rm that it is 1, which

Day Indicator movement, press any button.

E-71

E-73

E-23

E-25
E-31

E-18
E-34

E-27

E-63

E-75

—

—

E-77

E-79

E-74

Charging

■ The watch does not resume operation after I expose it to light.

This can happen after the power level drops to Level 3 (page E-14). Continue
exposing the watch to light until the
second intervals).

The ■

Second Hand starts to move at one-second intervals, but then suddenly

returns to moving at two-second intervals.

The watch probably is not suffi ciently charged yet. Continue keeping it exposed to
light.

Second Hand starts moving normally (at one-

Time Calibration Signal

The information in this section applies only when LONDON (LON), PARIS (PAR),
ATHENS (ATH), HONOLULU (HNL), ANCHORAGE (ANC), LOS ANGELES (LAX),
DENVER (DEN), CHICAGO (CHI), NEW YORK (NYC), HONG KONG (HKG), or
TOKYO (TYO) is selected as the Home City. You need to adjust the current time

manually when any other city is selected as the Home City.

E-76

■ The current time setting changes after I set it manually.

You may have the watch confi gured for Auto Receive of the time calibration signal
(page E-25), which will cause the time to be adjusted automatically according to your
currently selected Home City. If this results in the wrong time setting, check your
Home City setting and correct it, if necessary (page E-34).

■ The current time setting is off by one hour.

Possible Cause Remedy Page

The period when summer time is applied
in the location where you are using the
watch may be different from the period
set for your currently selected Home City.

E-78

Use the procedure under “To switch
between standard time and summer time
manually” to switch from AT (AUTO)
to STD (for standard time) or DST (for
summer time).

E-37

■ The x Second Hand indicates N (NO) when I check the result of the latest
receive operation.

Possible Cause Remedy Page

You are wearing or moving the watch, x
or performing a button operation
during time calibration signal receive
operation.

The watch is in an area with poor x
reception conditions.

You are in an area where signal reception
is not possible for some reason.

The alarm time was reached during time
calibration signal reception.

The calibration signal is not being
transmitted for some reason.

Keep the watch in an area where
reception conditions are good while time
calibration signal receive operation is
being performed.

See “Approximate Reception Ranges”. E-20

The alarm sounded during time
calibration signal reception, causing
reception to be canceled.

Check the website of the organization x
that maintains the time calibration
signal in your area for information about
its down times.

Try again later. x

■ Auto Receive is not performed or I cannot perform Manual Receive.

Possible Cause Remedy Page

The watch is not in the Timekeeping
Mode.

Your Home City setting is wrong.

Auto time calibration signal reception
is OFF.

A countdown timer operation is in
progress.

There is not enough power for signal
reception.

Hold down C at least two seconds to
enter the Timekeeping Mode.

Check your Home City setting and
correct it, if necessary.

Check the auto time calibration signal
reception setting.

In the Countdown Timer Mode, stop the
timer operation and then return to the
Timekeeping Mode.

Expose the watch to light to charge it. E-12

Operation Guide 5240

x

■ Signal reception is being performed successfully, but the time and/or day is
wrong.

Possible Cause Remedy Page

Your Home City setting is wrong.

The watch may have been exposed to
magnetism or strong impact, which has
caused problems with proper hand and
day indicator alignment.

E-80

Check your Home City setting and
correct it, if necessary.

Adjust the watch’s hand and day
indicator home positions.

E-27
E-34

E-68

Specifi cations

Accuracy at normal temperature: ±15 seconds a month (with no signal calibration)
Timekeeping: Hour, minutes (hand moves every 10 seconds), seconds, day

Calendar system: Full Auto-calendar pre-programmed from the year 2000 to 2099
Other: Home City code (can be assigned one of 29 city codes and Coordinated

Universal Time); Daylight Saving Time (summer time) auto switching /
Standard time

Time Calibration Signal Reception: Auto receive up to six times a day (5 times a

Receivable Time Calibration Signals:

E-82

Power Supply: Solar panel and one rechargeable battery

Approximate battery operating time: 6 months (no exposure to light after a full
charge; 10 seconds beeper; one temperature measurement; one calibration signal
receive per day)

day for the Chinese calibration signal; Remaining auto receives
cancelled as soon as one is successful); Manual receive

Mainfl ingen, Germany (Call Sign: DCF77, Frequency: 77.5 kHz);
Anthorn, England (Call Sign: MSF, Frequency: 60.0 kHz); Fukushima,
Japan (Call Sign: JJY, Frequency: 40.0 kHz); Fukuoka/Saga, Japan
(Call Sign: JJY, Frequency: 60.0 kHz); Fort Collins, Colorado, the
United States (Call Sign: WWVB, Frequency: 60.0 kHz); Shangqiu City,
Henan Province, China (Call Sign: BPC, Frequency: 68.5 kHz)

World Time

The indicated World Time is wrong.■

There is a problem with your Home City settings.
Check your Home City settings.
See “To confi gure Home City settings” (page E-34).

The indicated World Time is one hour off.■

The daylight saving time (summer time) setting for the World Time city is wrong.
See “To view the time in another time zone” (page E-54).

Alarm

The alarm does not sound.■

Power may be low. Expose the watch to light until the

x

normally, at one-second intervals (page E-14).

x

The time setting is wrong in terms of a.m. and p.m.
The crown may be pulled out. Push the crown back in. x

Thermometer:

Measurement and display range: –10 to 60°C (or 14 to 140°F)
Display unit: 1°C (or 2°F)
Other: Calibration; Manual measurement (button operation)

Temperature Sensor Precision:

±

2°C (±4°F) in range of –10 to 60°C (or 14 to 140°F)

World Time: 29 cities (29 time zones) and Coordinated Universal Time

Other: Daylight Saving Time (summer time) / Standard Time

Stopwatch: Measuring capacity: 1:59'59.95"

Countdown Timer:

Alarm: Daily alarm
Other: Power Saving; Auto Correction of Hand Home Positions

Measuring unit: 1/20 (0.05) seconds
Measuring mode: Elapsed time
Flyback timing

Measuring unit: 1 second
Input range: 1 to 60 minutes (1-minute increments)

Second Hand starts moving

E-81

E-83

E-84

City Code Table

Summer Time Period

Summer Time

Start

None None

2:00 a.m., second

Sunday in March

Midnight, second

Saturday in October

Midnight, third

Sunday in October

Summer Time Period

Summer Time

Start

None None

2:00 a.m., fi rst

Sunday in October

2:00 a.m.,

last Sunday in

September

Summer Time End

2:00 a.m.,

fi rst Sunday in

November

Midnight, second

Saturday in March

Midnight,third

Sunday in February

or Midnight,fourth

Sunday in February

Summer Time End

3:00 a.m., fi rst

Sunday in April

3:00 a.m., fi rst

Sunday in April

Los

Angeles

Rio De

Janeiro

UTC Offset/

GMT Differential

–8

–3

UTC Offset/

GMT Differential

City Code City

PAGO PAGO (PPG) Pago Pago –11
HONOLULU (HNL) Honolulu –10
ANCHORAGE

LOS ANGELES

DENVER (DEN) Denver –7
CHICAGO (CHI) Chicago –6
NEW YORK (NYC) New York –5

SANTIAGO (SCL) Santiago –4

RIO

L-2

DUBAI (DXB) Dubai +4 None None
KABUL (KBL) Kabul +4.5
KARACHI (KHI) Karachi +5
DELHI (DEL) Delhi +5.5
DHAKA (DAC) Dhaka +6
YANGON (RGN) Yangon +6.5
BANGKOK (BKK) Bangkok +7
HONG KONG
TOKYO (TYO) Tokyo +9
ADELAIDE (ADL) Adelaide +9.5
SYDNEY (SYD) Sydney +10
NOUMEA (NOU) Noumea +11 None None

WELLINGTON

L-4

(ANC) Anchorage –9

(LAX)

City Code City

(HKG) Hong Kong +8

(WLG) Wellington +12

City Code Table

City Code City

F. DE NORONHA

PRAIA (RAI) Praia –1
UTC

LONDON (LON) London

PARIS (PAR) Paris +1

ATHENS (ATH) Athens +2

JEDDAH (JED) Jeddah +3 None None

TEHRAN (THR) Tehran +3.5

xBased on data as of December 2010.

x



The rules governing global times (UTC offset and GMT differential) and summer
time are determined by each individual country.

x



The summer time periods in this table are applicable to specifi c cities. For cities not
included in the list, select the list city that is in the same time zone as the desired city
and perform STD/DST settings manually.

(FEN)

Fernando

de Noronha

UTC Offset/

GMT Differential

–2

0

Summer Time Period

Summer Time

Start

None None

1:00 a.m., last

Sunday in March

2:00 a.m., last

Sunday in March

3:00 a.m., last

Sunday in March

Midnight, March

22 or Midnight,

March 21

Summer Time End

2:00 a.m., last

Sunday in October

3:00 a.m., last

Sunday in October

4:00 a.m., last

Sunday in October

Midnight,

September 22

or Midnight,

September 21

L-1

L-3

L-5