What happens during the ceremonies in December in the giver?

Ceremony of One: Named and given to families

Ceremony of Three: Girls start growing their hair and receive their hair ribbons; both males and females start dream-telling each morning at breakfast.

Ceremony of Four: Receive a jacket with buttons on the back, to teach children interdependence.

Ceremony of Seven: Receive a new jacket with front buttons, to teach independence.

Ceremony of Eight: the comfort object given at birth is taken away, the children all start their mandatory volunteer hours, and they are given a new jacket with pockets and smaller buttons.

Ceremony of Nine: Receive a bike, females stop wearing hair ribbons.

Ceremony of Ten: Males get shorter haircuts and females stop wearing braids

Ceremony of Eleven: Females receive new undergarments, men get longer pants

Ceremony of Twelve: All Twelves receive their Assignment, or future career, stop doing volunteer hours, and begin training for their assignment.