Okay so I'm trying to get a rotation set up, but syncing up everyone's seasons is a bit difficult. I remember seeing some mod/CC that was able to change it, but it may have been the aspiration award? Is there any CC object or mod that easily allows a switch of seasons just so everyone get get sync'd and a rotation easier to establish? If there isn't I'll just use the aspiration award. It's getting tiresome having to do elongated sessions with families just because moving them in turned the season to Summer.

Not sure if Simwardrobe's "season and weather controller" is available else anywhere now, but that's the one I've been using for any Seasons needs. You can change seasons, weather, etc. with it, pretty sure you can add season days and all of that too, and to no aspiration costs. (I've mostly used it to turn off weather, but I know it comes with a bunch of options)

It looks like a green version of the blue-and-white oriental vase.

Simwardrobe folder:
https://simfileshare.net/folder/87829/
Objects - Other Objects --> "SW-Seasons-And-Weather-Controller1.1.zip"
(the included picture shows how the seasons are oriented, if you need to change them).

Also Nopke has the TimeWeatherManager in their unpublished mods:
https://simnopke.tumblr.com/unpublished

Simwardrobe created a CC vase Season and Weather controller. It can be found HERE

Something else I use to synch my lots is the Day of Week vase found HERE .