Please note that the server maintenance will begin at 2 AM EST, or 7 AM GMT, which means we have 1 hour to grab Monday's tickets and strongbox before the servers are taken offline.
If you play on both servers, NA and EU, you might want to try for tickets on the one that matters the most to you, then try on the other one if there's still time. I've gotten my tickets within no longer than 15 minutes of trying, so hopefully 1 hour will be plenty of time for grabbing tickets on both servers.
If you do daily crafting writs or other daily jobs, you might want to just grab the assignments and not worry about trying to do them, unless you have plenty of time after getting your tickets.
If you start the download and update as soon as it's available when the servers come back up, and if it doesn't take much longer than 24 to 36 hours, you should still be able to get your Tuesday tickets and strongbox, then do any daily writs or other jobs that you'd accepted Monday morning, such that you don't miss any days.
That's my hope, at least.
I've fought mudcrabs more fearsome than me!