Guild Wars 2

The new living story is coming on the 21st but does any one know what time?
has this been mentioned?

Only in the forum threads discussing it. (The Devs never announce a release time.)

Probably usual patch time, 12pm EST.

Scheduled releases, i.e. those that have (nearly always) taken place on Tuesdays have mostly released after 9 AM Pacific (UTC-8) and before 10 AM. A small fraction have released between 10 am and 2 pm and a tiny fraction around 4-6 pm. (This dovetails with ANet’s business hours in Seattle.)

The 21st is a Monday, which means the devs didn’t have their usual day-to-prep, so I wouldn’t bet that the precedents are going to accurately predict the patch time.

tl;dr could be 9 am; could be 5 pm.

12:17pm EST

As the dragon flies.

All I know is they’re usually done before I get online at about 5pm GMT.

But as Illconceived Was Na said it wouldn’t be surprising if this one was later than usual because they won’t have had as much time to prepare the build.