In what I think we can all take as final confirmation that is not going to be hit with one more super-last-second delay, has revealed a somewhat complicated rundown of the game's global preload and unlock times.
The preload times are simple enough: If you're on Xbox Series X/S, you can be preloading right now if you Yono all app really want to get ahead of the crowd, while those of us on PC can start the ball rolling at 4 pm UTC (8 Yono all app am PT/11 am ET) on March 17, three days ahead of the March 20 launch date. The PS5 crowd will have to wait just a wee little bit longer, until 12 am local time on March 18.
Note that unlike a lot of big game launches, Assassin's Creed Shadows will not have any kind of "early unlock" for people who preorder or shell out for a collector's edition. A three-day early access period was originally planned, but Ubisoft when it delayed Assassin's Creed Shadows into 2025.