Make sure you adjust the date by releasing the crown in correct position as per maufactures manual .Also set the date at correct time during night as close to 12h00 pm as possible .There are very helpfull videos available on youtube explaining when and how ro adjust the date setting.IF that does not solve youre problem there might be something faulty then refer the watch back to supplier .However i own 3 of the casio "duro" marlin in different colour ways and never ad any issues .It is exceptional qaulity watch .