La Crosse Technology WIRELESS WEATHER STATION Instruction Manual page 33

The time zone default of the Weather station is 0h. To change to another time
zone:
1. Press the SET key after completing the LCD contrast setting in order to
enter the time zone setting (flashing).
2. Using the + key, set the time zone. The range runs from 0 to +12 and then
runs from -12 back to 0 in consecutive 1hour intervals.
3. Press the SET key to confirm and enter the "Time Reception ON/OFF
setting" or exit the setting mode by pressing the CH key
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