This is because the watch is not making allowances for Daylight Saving Time (summertime). Change the watch's DST setting* to "Auto DST", and it will adjust the hour setting automatically. Note that you should turn off the DST setting if you are in an area where Daylight Saving Time (summer time) is not used.
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-26). x To set the time manually See “Configuring Current Time and Date Settings Manually” (page E-48). E-5 Go to step 2. The watch is charged. For details about charging, see “Charging the Watch” (page E-12
Home City and Summer Time Time and Date E-4 Configuring Home City, Time and Date Settings xConfigure Home City and summer time settings first. After that, configure time and date settings. 1. In the Timekeeping Mode, hold down A until the flashing SET indicator disappears from the display and the currently selected city code appears on the

3. Set the current time. • To set the time using a time calibration signal See “To get ready for a receive operation”. • To set the time manually See “Confi guring Current Time and Date Settings Manually”. The watch is now ready for use. • For details about the watch’s radio contr olled timekeeping feature, see “Radio

To change the daylight saving time setting for the Casio G-Shock GA-2100-4AER, follow these steps: In time mode, hold down the A button until the flashing SET indicator disappears from the display and the currently selected city code is shown. Press the C button to enter the DST (Daylight Saving Time) setting mode. . 234 312 76 430 198 70 102 17

how to set daylight savings time on casio g shock watch