Sept. 2, 1752 was a Wednesday. Adding fourteen days (two weeks), can you figure out what day of the week Sept. 16, 1752 was?
Halloween falls on a Saturday this year. July 4 next year will be on a Sunday.
If you own a perpetual calendar, you can look these dates up.
But without having a calendar handy, could you determine on what day of the week Valentines Day falls next year? Or Christmas? Your birthday? Uh, okay ... how about Easter Sunday?