noun Chiefly British.
Origin of Midsummer Eve
Examples from the Web for midsummer eve
Midsummer-eve, when the days are longest and the nights shortest, was now come.
It was then one o'clock, and midsummer-eve, the very time that twelve years before John had gone down into the hill.
As I stood gazing around me I remembered it was Midsummer-eve.Farthest North|Fridtjof Nansen