Three years ago I created RegularlyScheduled as a way to make it easier to coordinate events that happened on a repeating schedule. My main motivation was to make it easier to get together with my friends from college, but I thought maybe it would be useful to other people as well. Several years later, however, it doesn't seem to have been as widely useful as I'd hoped and it's more work to maintain than I'm looking for, so I'm shutting it down.
There are 44 registered users, most of them friends of mine, and two events. One event is a 1st Mondays and 3rd Thursdays dinner series I was hosting, and the other is a regular pre-dance dinner a friend organized. That neither is running right now makes it an easier time to make a change like this!
If there was no maintenance required I'd be happy to run it indefinitely, but it has a database, sends email, handles authentication, and receives commands from strangers over the internet. Perhaps it's more surprising that it hasn't required more work!
I've written to everyone who's signed up, given event owners a list of their subscribed guests, and encourage themnmiri to move to other systems, like Google calendar. While I don't know of anything that provides exactly the same features, it's not different enough or popular enough for me to be willing to keep it running.
I've redirected the domain name to this post for now, and I'm not planning to renew it. It will expire in ~3y, but if anyone wants it let me know.