Jovial a. : Of or pertaining to the god, or the planet, Jupiter.

Jovial a. : Sunny; serene.

Jovial a. : Gay; merry; joyous; jolly; mirth-inspiring; hilarious; characterized by mirth or jollity; as, a jovial youth; a jovial company; a jovial poem.

Example:
How can I write on Xmas holiday invitation card that sound Jovial?

Taxonomy
free encyclopedia, Software Engineering, International Algorithmic Language, MIL-STD, Program Office, processor, aircraft, rehosting, JPO, Army, MIL-STD-1589, military aircraft, search, high-order, order computer, specialized computer, computer systems, acronym.

Defination from the web:
JOVIAL include the Milstar Communications Satellite, Advanced Cruise Missile, B-52, B-1B, B-2 bombers, C-130, C-141, and ... Page on Jules Schwartz, including film of a humorous talk on the development of JOVIAL ...