How do I set the clock on my Honeywell thermostat?
Press the CLOCK button, then press the up or down arrow (s or t) to adjust the time. Press and hold the arrow to advance the time more quickly. Press DONE to save your changes or CANCEL to exit without saving. The thermostat automatically updates for daylight savings time.
From the official Honeywell Th8320U1008 Thermostat manual, page 6
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