Daylight Saving Time has ended in North American on Sunday, November 5. After this time change, all scheduled in-game activities like Sieges, Olympiad, Ceremony of Chaos, Dimensional Raid, Daily Vitality, and Instances will reset at the same server time as before, but will occur 1-hour earlier in real world time in time zones that participate in the time change.
If there are any questions about this change, please feel free to post them here.