I resubbed on day before Christmas and started the event, but PS4 has been down since the evening of Dec 24th. I have never missed an event achievement in my history with the game, and if PS4 is not back up on time to finish then not only would I not be able to get the achievement but also the things they are selling in the shops. Actually, due to the daily limit on the event quests to 1 a day each city, it will now be impossible for me to get all of the items in the shop without an extension.