Casio 5638 Operation Manual page 5

4.
Press (C).
5.
Use (D) to select a summer time setting.
Each press of (D) cycles through available
settings in the sequence shown below.
[AUTO]
●
The watch switches between standard
time and summer time automatically.
[OFF]
●
The watch always indicates standard
time.
[ON]
●
The watch always indicates summer
time.
6.
Press (B) to exit the setting screen.
Setting the Time/Date
●
1.
Enter the Timekeeping Mode.
Navigating Between Modes
l
2.
Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
Home City
Operation Guide 5638
3.
Keep pressing (C) until the setting you
want to change is flashing.
Each press of (C) moves the flashing to
●
the next setting in the sequence shown
below.
Home City
12/24-hour timekeeping
Date display format
Day of the week language
Appointment notification tone on/off
Operation tone enable/disable
Auto Light enable/disable
Illumination duration
Airplane Mode on/off
Summer time
Second
Hour
Minute
Year
Month
Day
4.
Configure the date and time settings.
To reset the seconds to 00: Press (D).
●
1 is added to the minutes when the
current count is between 30 and 59
seconds.
Use (A) and (D) to change the other
●
settings.
5.
Repeat steps 3 and 4 to select time and
date settings.
6.
Press (B) to exit the setting screen.
Switching between 12-hour and 24-
●
hour Timekeeping
You can specify either 12-hour format or 24-
hour format for the time display.
1.
Enter the Timekeeping Mode.
Navigating Between Modes
l
2.
Hold down (B) for at least two seconds.
Release the button when the name of the
currently selected Home City appears on
the display.
Home City
3.
Press (C) twice.
This causes [12H] or [24H] to flash on the
display.
4.
Press (D) to toggle the setting between
[12H] (12-hour timekeeping) and [24H]
(24-hour timekeeping).
12-hour
timekeeping
5.
Press (B) to exit the setting screen.
24-hour
timekeeping
5