The Organized Play is going to start soon, and of course, it will have a event pack. Here you have an article to see the contents: https://aristeiathegame.com/blog/item/459-agl-event-kit
I've seen the 26th of February in regards to the season starting in a couple of different places, and the kits ship on the 23rd... I'd leave a few days to allow for shipping and then a few days more for advertising and organising, but if the OTM allows you to input the information you can pretty much have at it whenever you can.