The reunion problem is a logistics problem
A reunion is easy to propose and hard to run. Dates drift, the venue changes once or twice, and replies scatter across a chat that half the class muted years ago. Someone who lives abroad hears about it late, someone else has a different date in their phone, and the final number is a guess.
The fix is not another occasion type; a reunion is a general gathering, and general gatherings are best served by one clear page and one honest list. Put the whole plan on a single shareable link, and let every reply land somewhere you can actually read, no matter which time zone the person is typing from.