Neverwinter is a world-wide game. Just spend a few minutes in Protector's Enclave and you will see chat and item links in a variety of different languages.
The schedule of in-game events appears to be heavily biased towards people who are playing on the West Coast of North America however. Currently the event schedule is somewhat pockmarked as a number of events around Gauntlgrym are currently disabled and show up as gaps in the schedule. The events do change and shift a bit from day to day and the schedule is not a static 24 hour cycle, but in general you can expect to see a Dungeon Delve event about every 4-6 hours.
The exception is that every day there is a Double Dungeon Delve at around 11pm and then again 1AM Pacific (AKA Cryptic Studios) time. This means that gamers in that time zone can get 4 hours of continuous Dungeon Delve in during 'gamer prime time'
10:30 start a dungeon
11:01 relog to get a chest unlock before defeating the final boss
11:15 finish first dungeon and start second faster dungeon
11:50 finish second dungeon and start a longer dungeon
12:40 finish long dungeon and start a dungeon
01:01 relog to get a chest unlock
01:15 finish dungeon and start Castle Never or another fast dungeon followed by a slow dungeon that is started while the event is active.
In the interest of fair play across all the time zones I suggest that, at least until Gauntlgrym is launched, the Dungeon Delve schedule be every 3 hours except for one 4 hour gap corresponding to early AM in the middle of the pacific in order to have some variability in the phase of the event from day to day. That way all time zones get a roughly equal shot at having a good 'early evening' and then 'late evening' dungeon run rather than shafting some time zones and giving California players a huge advantage.
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