From the Dexella on the EQ2 Forums:
Greetings intrepid gamers,
For the many of you asking the question, yes, we will be having a double XP weekend for this upcoming holiday. We have it scheduled from 12:01 AM Saturday until 11:59 PM Monday.
We hope you have a wonderful weekend!
Time Zone Conversions
- PDT: Saturday, Sep. 1 @ 12:01am ~ Monday Sep. 3 @ 11:59pm
- EDT: Saturday, Sep. 1 @ 3:01am ~ Tuesday Sep. 4 @ 2:59am
- BST: Saturday, Sep. 1 @ 8:01 ~ Tuesday Sep. 4 @ 7:59
- CET: Saturday, Sep. 1 @ 9:01 ~ Tuesday Sep. 4 @ 8:59