have a field day

== English == === Etymology === Some postulate the idiomatic usage is derived from the "parade day" military use. A parade is much easier than the soldiers’ usual drilling and intense exercise. === Pronunciation === === Noun === field day (plural field days) (military) A day for maneuvers and tactical exercises in the field (across the landscape). (US) A school day for athletic events. Synonym: sports day A day of class taken away from school for a field trip. (idiomatic) A great time or a great deal to do; a period of bustling activity. Coordinate term: field night (idiomatic) A great time or a great deal to do, at somebody else's expense. (US military, specifically US Navy, US Coast Guard and US Marine Corps) A day on which there is top-to-bottom all-hands cleaning. ==== Translations ==== === See also === open field (idiomatic) === Anagrams === ladyfied