This isn't suggesting the dark harvest festival to happen each year, because I know it happened last year and it is happening again this year

What I am suggesting is that during the dark harvest festival there should be masks unique to that year. Much like how a promotion would be unique to that specific time.

Last year was spookat mask / zombie mask / phantom mask.

Perhaps a punkin soldier mask this year? A bomber-looking evil jack-o-lantern mask that has a fuse for a stem is what I am imagining.

Or, if people don't like the idea of not being able to ever get the old masks again, then perhaps instead of making them exclusive to that year we could simply add more new masks in addition to them?