A very important day of festivity; specifically in the Inns of Court, a day of special celebration in each of the four terms of the year (now historical).
Origin
Early 17th century; earliest use found in George Chapman (?1560–1634), poet and playwright.
Definition of grand day in US English:
grand day
noun
A very important day of festivity; specifically in the Inns of Court, a day of special celebration in each of the four terms of the year (now historical).
Origin
Early 17th century; earliest use found in George Chapman (?1560–1634), poet and playwright.