Quote Originally Posted by noxybell View Post
DMM wiki shows that they had their first Yatagarasu event on the first week of August, roughly a week later.
Look again. The Yatagarasu event started on DMM on August 31. That schedule is still 5 weeks ahead of us. Lining up the timing with holiday events would require 5 weeks of catch-up, which obviously is opposite of delays.

Your interpretation assumes some degree of long-term planning by whoever is managing this game. I think you give them too much credit. They plan one week ahead, and even that's generous. Releasing new content on a Friday is a bad idea because then there's no one to fix problems when they arise. Releasing new content on a Monday requires preparation the Friday before (and therefore, planning). Tuesday just happened to fit nicely into their work schedule.