Seasonal Shift - New User

I have Flex Monthly schedules set for my 4 zones. Is Seasonal Shift applicable to Flex Monthly schedules because I don’t see it listed as an option? I believe the controller is supposed to adjust watering times based on location/seasons. We’re headed into an unusually warm stretch for 2 weeks in SW Michigan. Should I add a 2nd schedule or should the controller adjust for it?

Monthly Flex schedules adjust the watering duration and time between runs at the beginning of every month based onthe weather history for that month. For example, the duration for my zones is increased by several minutes in July compared to June because it is hotter in July.