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I also live in Nevada and here is how I worked around/through this issue. I created programs for Drip and Grass zones for all 4 seasons. Then I promote or demote programs I need from the Saved Programs, to the active positions of A,B,D & D after the season change has happened. You can verify the changes in the Calendar page of the app. I tried to attach screen shots of my calendar. Hope this helps.
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