when do the azur lane world of warship event end?

My guess is that representatives from both sides meet, and go over which ships would be popular or recognizable enough to worth swapping over. I don't think there's any 'rule' per say on who gets swapped over to the other side, outside of some WG-created phantasy ships becoming the Priority Research ship girls in AL. Though they are fast running out of non-historical ships which aren't the big gun BBs. So that means they could take the Alaska since the Azuma is currently the only Large Cruiser. So that means no Thunderer, no Kremlin, no Kurfurst etc. Currently there are quite a few ships that could become shipgirls though they tend to stay away from the 'big guns' battleships since they don't even have the Yamato in the game. So last time we got an Azuma captain and they got the Azuma shipgirl. Usually one is one of the girls added in the collab. The general rule of thumb is that AL will take non-historical ships as their new ship girls whilst WoWs gets a slightly modified version of a tech tree ship as their premium with a camo and captain plus a new set of captains. The AL package which comes with the AL camo and a captain and the basic Impero package which comes with the ship and its 'standard' premium camo and no captain but we'll have to wait and see. This is why I'm thinking the Impero is possibly going to be two different packages.

When do the azur lane world of warship event end?