Midwinter is to Midsummer as Yule is to —?
If you answered Litha, well...you're mostly right.
Midwinter and Midsummer are ancient. Cognate names survive in every living Germanic language, so they must have been known back in Common Germanic times, more than 2500 years ago.
Both holidays have by-names as well. The Hwicce—the Anglo-Saxon tribe ancestral (some say) to today's witches—also knew Midwinter as Géol and Midsummer as Líða.
Down the centuries Géol morphed into Yule. Líða didn't survive the passage of time, but during the 80s pagans rediscovered the word and gave it a new lease on life.
It's unclear what either word originally meant. Some have suggested that “Yule” may be kin either to gel—because it marks the coming of winter—or to yell, because “crying Yule” is a fine old midwinter's custom. In northern England, after Christmas services, people used to join hands and dance through the church shouting “Yule! Yule! Yule!”
I'll bet the vicar just loved that.