Is it possible to manually activate or deactivate daylight savings time?
To disable automatic adjustment for daylight saving time, press and hold both buttons until 'hours' and 'minutes’ show ‘oN:Su', release button ❶ but continue holding button ❷ until the display shows 'oF:Su'. The clock will now be set without auto-adjustment features (page 4).
From the official Park Life Bil Parkone2 Parking Disc manual, page 4
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