jovial

Marked by hearty conviviality and good cheer.

Pertaining to or characteristic of the god Jove or Jupiter; Jove-like; powerful; majestic.

Of or pertaining to the planet Jupiter.

In astrology, under the influence of the planet Jupiter; derived from Jupiter as a natal planet, which, like Jove himself, was regarded as the source of joy and happiness.

Hence [lowercase] Characterized by cheerfulness or gaiety; joyous; merry; jolly: opposed to grave.