Except the game is ran by a Chinese company. Jap*so observe this holiday, thou Elemental nations isn't exactly Japan, there are enough similarities (what are the holidays in Elemental nations anyway??)
So I'm not going to rule out the possibility, thou as most events are meh and/or ptw, I wont expect much either way.
Do you really think tencent decide what events are we gonna have? Oasis is there for that.