@PGYoung 

The maximum time interval you can set for smart plug's schedule is one week, longer intervals aren't supported.

You can raise a feature request post for it, though. Let's see how other users think about this feature, they can vote for your post and leave a comment if they share the same thoughts. Our product team will review the feature requests regularly, hot topics with detailed background information (e.g., use scenarios, reasons why you want or don't want a particular feature, etc) will be prioritized for evaluation.