holy day of obligation(n = noun.time) - a day when Catholics must attend Mass and refrain from servile work, and Episcopalians must take Communion;
is a kind of christian holy day
has particulars: january 1, solemnity of mary, ascension, ascension day, ascension of the lord, assumption, assumption of mary, august 15, all saints' day, allhallows, hallowmas, hallowmass, november 1, december 8, immaculate conception, christmas, christmas day, dec 25, xmas
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 shift, day watch, decoration day, degree day, discovery day, dominion day, each day, easter day, election day, ember day, empire day, every day, fast day, father's day, feast day, fete day, field day, financial obligation, flag day, forever and a day, future day, gain the day, good day, groundhog day, guy fawkes day, high holy day, holy, holy city, holy clover, holy communion, holy cross, holy day, holy eucharist, holy father, holy ghost, holy grail, holy innocents' day, holy joe, holy land, holy man, holy of holies, holy oil, holy order, holy orders, holy person, holy place, holy roller, holy roman emperor, holy roman emperor frederick ii, holy roman empire, holy sacrament, holy saturday, holy scripture, holy see, holy sepulcher, holy sepulchre, holy spirit, holy terror, holy thistle, holy thursday, holy trinity, holy war, holy war warriors, holy water, holy week, holy writ, holy year, 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, moral obligation, mother's day, movement of holy warriors, 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, obligation, order of the day, pan american day, pancake day, patriot's day, patriots' day, pioneers' day, polling day, poppy day, present day, presidents' day, quarter day, rag day, rainy day, 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, sidereal day, six day war, solar day, speech day, st john's day, st martin's day, st patrick's day, st valentine's day, tag day, term day, texas independence day, thanksgiving day, the holy see, 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, working day