Subject: Generally early March.
Posted on: 2021-02-24 13:42:00 UTC
What's happened the last few years is that someone posts a thread calling for signups (opt-ins, explicit opt-outs, conditions, and whatever description people want to offer) and suggested 'ships (the more the merrier!), and then about a week later someone - often the same person, sometimes not - announces the actual game.
Given that I've been mucking about with Shipfests past, I may well launch it myself on March 1st - Monday, if I'm reading the calendar right.
(Of course, if there's someone you're fairly sure is going to opt in, there's nothing to stop you pre-writing the fic, as long as you're aware you might have to drop it if they decide to stay out... ^_~)