If I had the EP that include holidays and festival, I would give them faith based celebrations. I would make them followers of my own cultural heritage's ancient ways: a mix of persian zoroastrianism and slavic pagan rodnovery. Holidays of the elements, plants and animals, New Year in the spring (Nowroz), Egg Day (Dyngus), Yuletide (like xmas), Day of the dead (Dziady in Polish, which is also celebrated on Nov 1 like the mexican dia de los muertos) and the holiday of romance/longest day of year (Noc Kupaly) will be on sims calendar when I get seasons! Also including sim sacrifice would be fun lol.
