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Events are becoming "Operations" in S5, which last longer and have a premium option
(www.halowaypoint.com)
* : Denotes a date based on leaks and, while likely, is subject to change.
I don't think I like "operations". Locking some (presumably the best) customization from the event and one of challenge slots behind a 500 credit paywall is sorta crappy. It's basically a second premium battle pass that we don't need.