Peering into your mailbox and seeing a thick envelope trimmed with intricate calligraphy (or opening up the message in your inbox ... you’ll need to confirm your attendance by RSVPing.

DEAR MISS MANNERS: Maybe it’s because I took Spanish in high school instead of French, but what’s with “RSVP”? People say “Please RSVP” but also “You haven’t sent an RSVP.” ...