Turning off notifications per pack/world would be great.
What I miss most is the option to choose Monday as the first day in the week. In real life every calendar I see here on the European mainland has Monday as a first day. It is so confusing to have Sunday show up first. I know that's the American way but an option to change the UI would be nice. Google and Microsoft have this option in their settings so customers can choose from their calendars. Please let us choose in the sims too. I often make mistakes when viewing the calendar.