Two events run every hour on the global servers. The Shugo Festival starts on the hour. The Dimensional Invasion starts at half past. Both countdowns below are live.
Why the minute is the same everywhere
Time zones differ by whole hours in every AION 2 region. So an event at :00 is at :00 for everyone, and an event at :30 is at :30 for everyone. You only need to watch the minute hand.
What is not confirmed
NC's notices list both events as mission targets but give no timetable. The minute marks come from player trackers. Entry windows and level limits are not in any official notice we read.
FAQ
When is the Shugo Festival in AION 2?
Every hour, on the hour, according to player reports for the global servers.
When does the Dimensional Invasion start?
Every hour at half past, according to player reports.
Can I do both events in the same hour?
The starts are 30 minutes apart, so the schedule allows it. Whether you finish one before the other starts depends on your group.
Are the hourly event times official?
No. NC has not published a timetable for either event. The source label on each timer says so.