Wows Legends Treasure Hunt 2024 Dates. Where does it start, if it hasn't already. 94 promotion orders gets you 47 keys, so add the one you get.
The event runs from july 26 until august 28 (7:00 utc/2:00 cdt start and finish). Seems like they are replaced by the calendar unless they want to do the thing where you trade one resource for another.