We have different items that can be used for different holidays for different faiths, if that's what you choose to do. The game is made generic so that we can create our own holidays, such as Christmas. There's a Christmas tree, a present pile, Santa arrives in the evening, and you can even sing something that sounds very similar to Jingle Bells. You can even change the name in the holiday to Christmas if that's what you want to do. They omit all specifically religion based names, and just provide different items - so I have a few random Hijab wearing townies. People can create a sim following Islam if they want to, some items are included, but they don't include Ramadan or anything specific, in the same way that don't include 'Christmas'. I like the way they do it, it enables us to customise our own holidays, for whoever plays.