GA100-1A1 Watch Manualhttps://wwwalslibOpen manual Daylight Saving Time(DST) / Summer Time Adjustment - CASIO Daylight Saving Time(DST) / Summer Time Adjustment. Q1 How can I adjust the time of my watch at the time of switching Daylight Saving Time (Summer Time)? A1 If the module no. of your watch is one of following 27 modules, (Summer Time) setting in the operating instruction manual of your watch.Manuals · Daylight Saving Time G-Shock Watch Manuals, Help and Support | Casio - G-Shock NOTICE OF POSSIBLE SCAM. It has come to Casio's attention that unknown persons have been promoting a supposed offer in which a promise of payment by cashier's check is made to people willing to post a Casio or G-SHOCK advertisement on their vehicle.