So already we have the Black Friday sale, Winter sale, Summer sale and release sales, but I think there should be some other, less common sales which occur in anniversaries. There could be one for MegaCraft's birthday which could be a yearly sale that lasts for a couple of days, and other sales for things like the 1 year release of creative or skyblock.
Interestingly enough, all current servers launched in September except Minigames (Creative, SkyBlock, Prison) and Mega itself started in July. Perhaps we might do a yearly sale on Mega's birthday.
If if you mean "except" when you said "expect", my interpretation is that all the serves started in July except Minigames. Also, are you still doing this? (Below)