It’s a minor annoyance at best, but my group uses OurCal to share work schedules and some of us work overnights. That means that when a shift happens to cross over midnight, it comes up as an event spanning two days. Which yes, is technically correct, but when my roommate works until 01:30AM I don’t want to see her work notification on my calendar all day after she’s already clocked out and home. An adjustment to be able to start the new day at a custom time such as 4AM would prevent this.