During the 12th and 13th, your characters will feel a heightened sense of bitterness over events in their past, whether it's something they truly feel bitter about or not. Your character will feel compelled to reproach the people who they feel inflict that bitterness, too.
It will last at least one day, but the intensity of this bitterness will start to decrease after a while.
On the 14th... Have a list.
( The main event & misc crap! )
Neither event is mandatory! The decorations and such are, of course, but that's obvious.
As usual, feel free to ask any questions o/