Oregon Scientific RM926 Manual Del Usuario página 6

Press MODE to toggle between 3 clock displays:
Hour-Minute-Second (local time)
Day-Month (of local time)
Hour-Minute-Day of the Week (local time)
Day-Month (of local time)
All manuals and user guides at all-guides.com
SETTING THE CLOCK AND CALENDAR
Before you can manually set the clock and calendar, you
must specify the current time-zone you live in and the
time format (12- or 24-hour).
1. Press and hold MODE for 2 seconds to enter clock
setting mode. The time-zone offset hour digits will
blink. The default value of the offset hour is "00".
When an offset hour has been set (e.g. +1), the time
displayed will be the radio clock time plus 1 hour.