User blog comment:Crimson and Darkness/DxD Updates 2~/@comment-27083298-20170620032623/@comment-1359322-20170620144712

You clearly don't understand why it won't air on October if they're releasing the pv in that festival. Seasonal anime don't air in November and they don't air on end of the month.

Seasonal anime air on the first two weeks of January, April, July and October. That's so they can end with 12/13 episodes on March, June, September and December.