Hi, this is an interesting idea, and it’s in some sense similar to the 5+2 programming on many thermostats. At the moment we do not have plan to add this feature. Normally if you have a weekly program, you can split it into two, which would allow you to use different start times on weekends. But if I understand correctly, you have a interval day program, which you can’t easily split since the firmware doesn’t keep track of the day of the week for interval day programs.