It is possible. It looks to me like these are norms for drawing up the liturgical calendar which could not be done by an individual priest but would require a bishop or conference of bishops, and also approval by Rome: “Particular calendars, drawn up by the competent authority, must be approved by the Apostolic See.” (#49) But certainly I might be wrong. I still wonder why the decree about the Ascension reads this way:
Link:
usccb.org/liturgy/innews/799.shtml
This seems odd, if an individual priest or even a bishop can move a holy day to Sunday. Or maybe it’s because it’s not a day of obligation (because of being on a Monday) that it can be moved without decrees from the conference of bishops? Maybe it’s the removal of the obligation that can’t be done unless the conference of bishops makes a request to Rome, but since the USCCB has already removed the obligation because it falls on Monday, you can move the celebration to Sunday? I’m just guessing.
It’s nice to have a priest you can trust to find out for sure before doing it. If our pastor scheduled All Saints Day as the liturgy this Sunday (he hasn’t), I’d be sure that he checked it out. Of course the reverse isn’t true–the fact that he didn’t do it doesn’t mean that it is not allowed, just that you’re allowed not to do it.
Maybe it comes down to whether the OP has reason to trust that the pastor would be careful about it. However, if the OP (I don’t think I’ve seen anything from him since the original post, maybe he has a life?) doesn’t know for sure, and the priest isn’t doing anything wrong on purpose, I think the benefit of the doubt could be given. Maybe in the lull between Christmas and Lent, the OP could respectfully ask the priest about it–in any case, I doubt anything would change it now for this time. OTOH, the same question could come up for January 1st, since it is on Saturday this year.
Anyway, the research was interesting.
–Jen