Automated sending for monthly calendars of 4-5-4 months

We are on a retail 4-5-4 calendar and Adobe WILL NOT fix the monthly automated sends to send by the end of the 4-5-4 calendar. They only send by gregorian calendar, meaning 1st of the month through the end of the month. Its not that they can’t fix it, they WON’T fix it. I’ve been trying to get them to fix it for 3 years now. All they will do is pat me on the head and say there, there. Infuriating.