(GROUP) [noun] [C + singular or plural verb] - a group of workers who do a job for a period of time during the day or night, or the period of time itselfAs the night shift leave/leaves, the day shift arrive/arrives.Are you on the night shift or the day shift (= Do you work during the night period or the day period)?
SHIFT
Meaning of SHIFT in English
Cambridge English vocab. Кембриджский английский словарь. 2012