From Longman Dictionary of Contemporary Englishswing shiftˈswing shift noun [singular] American English informalBEC workers who work from three or four o’clock in the afternoon until 11 or 12 o’clock at night, or the system of working these times
Examples from the Corpus
swing shift• When the swing shift comes on duty the clock says four-thirty, just like it should.• I was working the swing shift when Albert White said he knew a guy that was going to start a newspaper business.From Longman Business Dictionaryswing shiftˈswing shift American EnglishHUMAN RESOURCES a shift in a factory from 3 or 4 o'clock in the afternoon until 12 o'clock at night → shift 