Hi! Ascension is in May--for most areas, it is not a Holy Day of Obligation (on a Thursday)--it's celebrated on the Sunday. However, for a few diocese, it is a Holy Day of Obligation. So, there is a bulletin for the Sunday Mass or for Ascension--based on your location, you will use the Ascension as the Sunday Mass, or use the Sunday bulletin, then use the Ascension when you go to Mass on Thursday. I'm pretty sure that makes no sense-but it's bedtime and that's as clear as I get today. Good Luck!