1.  day shift(n = noun.time) - the work shift during the day (as 8 a.m. to 4 p.m.);
is a kind of duty period, shift, work shift

2.  day shift(n = noun.group) day watch - workers who work during the day (as 8 a.m. to 4 p.m.);
is a kind of shift

admission day, all day long, all fools' day, all saints' day, all souls' day, american indian day, annunciation day, april fools' day, arbor day, armed forces day, armistice day, ascension day, bastille day, bissextile day, boxing day, break of day, break of the day, by the day, calendar day, call it a day, candlemas day, childermas day, christian holy day, christmas day, citizenship day, civil day, clarence day, clarence shepard day jr., class day, columbus day, commencement day, commonwealth day, day, day after day, day bed, day blindness, day boarder, day book, day by day, day camp, day care, day care center, day game, day in and day out, day in day out, day jessamine, day laborer, day labourer, day lily, day nursery, day of atonement, day of judgement, day of judgment, day of reckoning, day of remembrance, day of rest, day of the month, day of the week, day off, day return, day school, day watch, decoration day, degree day, discovery day, dominion day, doppler shift, each day, easter day, election day, ember day, empire day, evening shift, every day, fast day, father's day, feast day, fete day, field day, flag day, forever and a day, future day, gain the day, good day, graveyard shift, groundhog day, guy fawkes day, high holy day, holy day, holy day of obligation, holy innocents' day, inauguration day, independence day, innocents' day, jewish holy day, judgement day, judgment day, labor day, lady day, lammas day, last day, leap day, lord's day, lunar day, major fast day, market day, martin luther king day, may day, mean solar day, memorial day, michaelmas day, midsummer day, midsummer's day, minor fast day, mother's day, naked as the day one was born, naked as the day you were born, name day, natal day, new year's day, night and day, night shift, order of the day, pan american day, pancake day, patriot's day, patriots' day, pioneers' day, polling day, poppy day, population shift, present day, presidents' day, quarter day, rag day, rainy day, red shift, red-letter day, remembrance day, rest day, robert e lee day, rogation day, saint patrick's day, saint valentine's day, saint's day, school day, seize the day, shift, shift key, shift register, sidereal day, six day war, solar day, speech day, split shift, st john's day, st martin's day, st patrick's day, st valentine's day, stick shift, swing shift, tag day, term day, texas independence day, thanksgiving day, three kings' day, time of day, transfiguration day, twelfth day, united nations day, unlucky day, v-e day, v-j day, valentine day, valentine's day, veterans day, veterans' day, victoria day, victory day, washing day, wedding day, work day, work shift, working day