Japanese company.

Halloween isn't a big celebration there, and their version of it is July-ish i think.
They also have a different version of Thanksgiving(since they don't care about native americans and pilgrims...) so i wouldn't expect much of an event there even though they have a similar version.

Christmas is the next major holiday i expect an event for, not including any fictional ones they add in game for lore. But I'll gladly accept any they decide to make even if they don't matter to anyone in the world except americans that want everyone to celebrate the same holidays.