Most calendars still start on Sunday, but work and school begin on Monday. Who’s right?

Sunday is part of the weekend, of course, but it’s considered the start of the week in both Judaism (from whose traditions the Gregorian calendar we use is derived) and Christianity. How you answer this question may thus hinge on your adherence to very old customs as opposed to modern practices, though it’s also worth noting that Sunday–Thursday isn’t that uncommon a workweek. One thing we can all agree on is that, whichever two days it consists of, a restful weekend has never felt more essential.