If you had hormonal constancy, as men did, you might not be taking your cues from your body about when to rest. You would have to build that in: Sunday is the day we don’t work, God’s day. But if what defined the days was you, your biological clock and calendar, then every day might as well be Tuesday. Perhaps you wanted to work for two weeks solid, recording a hit #1 album, and then rest for one whole week, while you were bleeding.
