How do I set up a program schedule on the Honeywell T4 Pro?

Press Menu and then Select to access PROG. You can program four time periods each day (Wake, Away, Home, and Sleep) with different settings for weekdays and weekends. For each period, set the start time and both heat and cool temperature setpoints. Press Home when finished to save. (Page 3)

From the official Honeywell T4 Pro Thermostat manual, page 3

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