We've had many of you asking about information on fortress siege times. Fortress times are no longer random. They follow a set schedule depending upon the day and time.
Aion: Assault on Balaurea added four new fortresses to siege and conquer. The addition of these four new fortresses into the current siege schedule is an ongoing process. We are currently working with our development team to improve upon this schedule.
The current schedule is as follows. Server times are PDT, EDT, and AEST for NA as defined by your server's specific timezone.