Web site for group scheduling?

Hey all. I’m looking for a site that allows people in a group to decide on a date that works for all of them. Here’s what I mean:

Imagine I am trying to plan a get-together with myself and 4 friends. I want to suggest say 5 possible dates, then allow the other 4 to log in and choose which of those work for them.

I KNOW I’ve seen this site before - someone had me use it once - but for the life of me I can’t remember it and now I need it.

Anyone know what I’m talking about?

Thanks!

Yes! Thanks SmartAlecCat!!