"I have no clue how I didn't catch it—and neither did my mom," the bride-to-be Jennifer Meyer, from Minnesota, told Newsweek.

Or maybe you wanted to attend an event, such as an art gallery show, and were prompted to RSVP for a head count. Whether it's ...

Ideally, the "RSVP by" date should fall three to four weeks before your wedding. Because your wedding invitations should be mailed six to eight weeks prior to the big day, guests should generally ...