Why not two Sundays? Having two Saturdays is still a little unrestful. Although, maybe not if you're Jewish. Just searched that, apparently, also the Adventists, Seventh-Day-Baptists, plus some orthodox branches have the Sabbath as a day to rest.

I'm apparently Lutheran (in northern Germany, it's just called "evangelisch"). Saturday is basically another work day where you don't go to work, but still work, anyway. Even or especially if you're hungover. Thought that could've been my mom's household-religion. "If you can party, you can work!" Mowing the lawn with thick head is a teaching moment. She thought. But it just made me more resilient.