The Lodestone lists the maintenance times for patch 3.3 as:
Jun. 6, 2016 3:00 a.m. to Jun. 7, 2016 3:00 a.m. (PDT)
So that’s 6am Monday to 6am Tuesday for those of us on the East Coast.
Anyone looking to get housing is advised to pick out their desired plot and be ready to make a run for it as soon as the servers come back up after maintenance. (The patch should be available to download early; it usually is.) Last time there was a land rush on Gilgamesh, at Christmas 2015, all the plots were bought up no less than 30 minutes after the rush started.
Sometimes the servers come up early; on rare occasions they may be late. Since we are hoping to make a land purchase for our sister FC (see below) some of our officers, including yours truly, will be up early — or possibly late — looking to get on at the first possible moment and get a jump on our chosen plots. I’m going to log on to Teamspeak around 4:30 am or 5am EDT to await the end of maintenance, and anyone else who is going to be waiting up is welcome to join me!