Most merry: var., 6 letters
Jolly times, 8 letters
Merrymaking, 8 letters
Cheerfulness, 6 letters
Fun and games, 6 letters
High spirits, 6 letters
Joyful exuberance, 6 letters
Merriment, 6 letters
Merrymaking, 6 letters
Revelry, 6 letters
A gay feeling, 6 letters
A festive merry feeling, 6 letters