If you make your own holiday does that mean only your household will celebrate the holiday you made, or will all unplayed households celebrate that holiday? For example, if I create a holiday to celebrate my sim's birthday, will everybody everywhere in all the worlds be celebrating the bday?!
Comments
Holidays are worldwide so they will be on every sim's calendar, even the custom ones you create. However, I'm not sure that other sims will do the traditions autonomously. Just make a holiday and play only your household on that day.