Quote:

Those of you looking forward to headstart, it will begin on August 25 at 00:00 PACIFIC Time. ~RB2 #GW2

This would translate to 08:00 UTC, or for our guild, that is 09:00 ERN. This is presuming they mean PST and not actually PACIFIC.

Source: https://twitter.com/GuildWars2/status/230717628174446592