It is open for 4 separate sessions each day which are an hour long : (EDT) 4 a.m., noon, 7 p.m. and 10 p.m.
For SG players, it would be
16:00 Noon
07:00 Morning
10:00 Morning
I guess PVP is still a dead dream for us people who actually go to work?? (or probably school too)
CMIIW