- the evening preceding Midsummer Day: formerly believed to be a time when witches and other supernatural beings caused widespread mischief.
Origin of Midsummer Eve
late Middle English word dating back to 1400–50
Also called Midsummer Night, St. John's Eve, St. John's Night.
St. John's Eve
Also called St. John's Night.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018