The 'scolding' part, could be a lingering carry over from how it drudges up memories, from his own childhood. The concept of being told that you were 'scolding' him, now carries over to your knowledge and/or feeling of his being 'mad at you.' Which, I would guess wasn't your intent to leave him feeling that way?

kaliope raises a valid point.

It's great that he likes to volunteer as much as he does, yet, every single holiday does indeed take away from your couple time. It's not fair, of him, to not place your needs and vacation time into account, before signing up for these events.

Maybe, the two of you can compromise, aside from your having to print out a list, if he is serious about your relationship, it's up to him, to show some consideration. When the sign up sheet comes along, perhaps he could stop, think, say, let me fill in my time, after he double checks the two of yours vacation schedule.

It's understandable to be angry, frustrated, disappointed, etc. It doesn't come across as a desire to scold him, just sounds frustrated since your need for consideration isn't taken into account.