It is vital to note that these aren't all the times. The most common times for world quests reset are 8 AM PST, 2 PM PST, 8 PM PST, and 2 AM PST. The biggest reset is typically at the daily reset, whichever time that is for your realms timezone ( UTC for US. Which was 11am and 11pm Eastern during the summer but as of last. The majority of them swap out at either the daily reset or 12 hours after that. World quests show up at 2am,8am, 2pm, 8pm blocks.
