Pesachim 6a at the very bottom says that discussion of matters concerning Passover should begin 30 days before the Holiday, on Purim. This is codified in the Shulkhan Arukh Orach Chaim 429. We are a bit late, but maybe we should make a Community Bulletin event for this?
I've created an event in the community bulletin called "Pesach prep (tag list)" that links to the list of tags we collected when beginning the haggadah project last year. There are lots of tags related to Pesach so I did this instead of just linking to pesach. But this can be easily refined.