Sunday’s jolly etymological fact: saying “By Jove!” comes from the Roman swearing in, where Jove is the god of the sky and thunder, and also the king of the gods. The planet Jupiter was named after Jove, leading to the adjective “jovial”, because those who were born ‘under’ Jupiter were said to be all happy and optimistic. Like the lining up of a distant planet can shape all the squishy brains that are being born on those days, and none of those that are just hanging around in a womb for a few days longer.