I’ve also done Wednesday to Wednesday, though Tuesday seems better mentally if only because there is one less day after the new week starts.

What is much better, though, is splitting the week into a 4/3 or 5/2 split, with a primary and backup on-call. Primary takes the weekdays, then switches with Backup for the weekend. You’re still sharp and aware of any current issues should the need arise, but the odds of a weekend page are (hopefully) lower, so you can relax a bit.

This of course requires enough people to have a reasonable rotation; 6 at a minimum, but 8 is better.