How do I program different schedules for weekdays and weekends?

Press SET CLOCK/DAY/SCHEDULE, then SET SCHEDULE. Use the arrow buttons to set separate times and temperatures for four periods: Wake, Leave, Return, and Sleep for both weekdays (Mon-Fri) and weekends (Sat-Sun). The thermostat comes pre-programmed with energy-saving settings assuming you wake at 6 am, leave at 8 am, return at 6 pm, and sleep at 10 pm. You can customize these settings by pressing NEXT between each period and DONE to save.