Errr, technically yes(?)
I used the set checkpoint you provided (was that your doing? I don't remember now) to get back to the wedding scenario quickly, but I also have one or two older saves that I jumped back to. Otherwise, I don't use checkpoints, only saves.
Also just noticed after some confusion: if the player uses the checkpoint to go back in time to the wedding, the time of day and the weekday changes, but the calendar day does not. I think the wedding is set for the 18th? If you're playing 3 days after that and use the checkpoint, the date turns from Wed. the 21st to Sun. the 21st.