It's currently unclear how long these events will last, but given past events, they could last up to two full weeks.
Blizzard Announces Boosted XP and Seasonal Currency with Two Diablo 4 Events
Blizzard has announced two events at the same time for Diablo 4, including boosted experience, extra gold, and increased seasonal currency drops. Starting on October 28th, players can turbocharge their progression and finish up their Seasonal Journey or maybe even enjoy a new character to celebrate the end of the Season of Chaos!
