Not sure this would work for me. I'm not a morning person, so getting up at 5am would not leave my evening "wide open for relaxing". I would feel like my time is shortened (rushed?) due to having to get in bed so early so that I can get up at 5am without feeling sleep deprived.

Conversely, since I'm more of a night owl, working at night can be problematic because I end up not being able to stop due to momentum and wanting to bring closure to what I'm working on, and then my brain not shutting down for another 30-60 minutes once I finally do go to bed.