
Festivus celebrates being alive at a time when it is hard to be alive. Since mankind crawled out of the primordial soup, at this time of year people have given thanks that great storms or wild beasts hadn't destroyed them, famine and drought hadn't killed them and insane leaders hadn't shuffled them off to war.
Families then prayed that next year's crops would grow, that wild animals wouldn't devour them, that they and their family would survive to do it all over again next year. Then they feasted, sometimes a little too heartily which led to airings of grievances, feats of strength and all the rest.
Festivus is as old as mankind, yet still as relevant as it ever was. Party on, you survived, you earned it.
Toad