Sorry if a thread like this already exists, but I couldn't find one, so...
What are your plans and ideas for custom holidays once you get your hands on Seasons?
Personally, I'm a fan of both Halloween and All Hallows' Day in real life, but having two so similar holidays in a row seems a little silly for the Sims, so I'll combine them and call the result All Hags' Eve (or, in my language, Allerhexen). It will be a holiday to visit the cemetery, remember the dead and maybe even summon their spirits if that's an option, all while dressing up as witches and zombies and all kinds of living, dead, and undead supernaturals to blur the line between the realms of the living and the dead.
I'm also thinking about building a futuristic community lot inspired by the Citadel from Mass Effect, and that's where some kind of alien holiday or festival could take place. I already have a couple of Asari in my game that could oversee that one.
What about you?