early shift; morning shift
Refers to a work shift that starts early in the day, often contrasted with 遅番 (late shift). Also used for arriving early for a shift.
See also: 遅番
I'm on the early shift this week, so I get up at 5 a.m.
Those on the early shift, please come to work by 7 o'clock.
Compound of 早 (early) and 番 (shift, duty).