My sister is lovely, and very generous, but we do clash at times over little things and I think it's best to be thrilled with the AC she's put thought into, which was my fave anyway as I'd already purchased it 😁.
If i can't sell the calendar as it is I might sell things on opening day as suggested by @BakeOffRewatch . That way i also get my surprise each day (I'm one of those who waits until December without peeking)