fall on

(v) : (of a holiday or event) To occur on a particular day.

(v) : To be assigned to; to acquire a new responsibility, duty or burden.

(v) : To experience; to suffer; to fall upon.

(v) : Of the eyes or gaze: to alight upon.

(v) : (archaic) To attack (someone); to join an attack on (someone), especially a surprise attack.