merrymaking (n.)

also merry-making, "a convivial entertainment, a mirthful festival," 1714, from an inversion of the verbal phrase make merry "be happy, be cheerful, be joyous, frolic" (late 14c.); see make (v.) + merry (adj.). The earlier noun was merry-make (1570s). Related: Merry-maker (1827).