Casio 3057 User Manual

1

MA0607-EA

• Button operations are indicated using the letters shown

in the illustration.

• Each section of this manual provides you with the

information you need to perform operations in each
mode. Further details and technical information can be
found in the “Reference” section.

Press     .

• Press C to change from mode to mode.

• In any mode (except when a setting screen is on the display), press B to illuminate

the display.

Use the Timekeeping Mode to set and view the current
time and date.

Read this before you set the time and date !
The times displayed in the Timekeeping Mode and World
Time Mode are linked. Because of this, make sure you
select a city code for your Home City (the city where you
normally use the watch) before you set the time and date.

• To view the current Home City code setting, press A

while in the Timekeeping Mode.

• For full information on city codes, see the “City Code

Table”.

1. In the Timekeeping Mode, hold down A until the

seconds start to flash, which indicates the setting
screen.

2. Press C to move the flashing in the sequence shown

below to select other settings.

Press D.

Use D (east) and B (west).

Press D.

Use D (+) and B (–).

Press D.

Use D (+) and B (–).

Reset the seconds to 

Change the city code

Toggle between Daylight Saving Time (

)

and Standard Time (

)

Change the hour or minutes

Toggle between 12-hour (

) and 24-hour

(

) timekeeping

Change the year, month, or day

Seconds

DST

Hour

Minutes

Year

12/24-Hour Format

Day

City Code

Month

3. When the setting you want to change is flashing, use D and B to change it as

described below.

• See “Daylight Saving Time (DST)” for details about the DST setting.

4. Press A to exit the setting screen.

• Resetting the seconds to 

 while the current count is in the range of 30 to 59

causes the minutes to be increased by 1. In the range of 00 to 29, the seconds are
reset to 

 without changing the minutes.

• With the 12-hour format, the   (PM) indicator appears on the display for times in the

range of noon to 11:59 p.m. and no indicator appears for times in the range of
midnight to 11:59 a.m.

• With the 24-hour format, times are displayed in the range of 0:00 to 23:59, without

any indicator.

• The 12-hour/24-hour timekeeping format you select in the Timekeeping Mode is

applied in all modes.

• The year can be set in the range of 2000 to 2099.

• The watch’s built-in full automatic calendar makes allowances for different month

lengths and leap years. Once you set the date, there should be no reason to change
it except after you have the watch’s battery replaced.

• The day of the week is automatically displayed in accordance with the date (year,

month, and day) settings.

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.

1. In the Timekeeping Mode, hold down A until the

seconds start to flash, which indicates the setting
screen.

2. Press C twice to display the DST setting screen.
3. Press D to toggle between Daylight Saving Time (

)

and Standard Time (

).

4. Press A to exit the setting screen.

• The 

 indicator is displayed on the Timekeeping

Mode and Alarm Mode screen while Daylight Saving
Time is turned on.

World Time shows the current time in 48 cities (29 time zones) around the world.

• All of the operations in this section are performed in the World Time Mode, which

you enter by pressing C.

• In the World Time Mode, you can press A to change the display format as shown

below.

Press     .

Timekeeping Mode time (Hour : Minutes) 
* The “P” indicator is not displayed 
  for the time displayed in the 
  World Time Mode. 

To view the time for another city code
In the World Time Mode, press D to scroll eastwardly through city codes.

• For full information about city codes, see the “City Code Table”.

• If the current time shown for a city is wrong, check your Timekeeping Mode time and

Home City code settings and make the necessary changes.

1. In the World Time Mode, use D to display the city code

(time zone) whose Standard Time/Daylight Saving Time
setting you want to change.

2. Hold down A for about one second to toggle between

Daylight Saving Time (

 indicator displayed) and

Standard Time (

 indicator not displayed).

• The 

 indicator is on the display whenever you

display a city code for which Daylight Saving Time is
turned on.

• Note that the DST/Standard Time setting affects only the currently displayed city

code. Other city codes are not affected.

• In the World Time Mode, you can switch the city code you currently have selected

as your Timekeeping Mode Home City between Standard Time and DST. The
setting you select in the World Time Mode will also be applied in the Timekeeping
Mode.

The stopwatch lets you measure elapsed time, split times,
and two finishes.

• The display range of the stopwatch is 59 minutes,

59.99 seconds.

• The stopwatch continues to run, restarting from zero

after it reaches its limit, until you stop it.

• The stopwatch measurement operation continues even

if you exit the Stopwatch Mode.

• Exiting the Stopwatch Mode while a split time is frozen

on the display clears the split time and returns to
elapsed time measurement.

• All of the operations in this section are performed in the

Stopwatch Mode, which you enter by pressing C.

(

  displayed) 

First runner 
finishes.
Display time of 
first runner.

Second runner 
finishes.

Display time of 
second runner.

Timekeeping Mode time
(Hour : Minutes) 
* The “P” indicator 
  is not displayed for the 
  time displayed in 
  the Stopwatch Mode.