market day(n = noun.time) - a fixed day for holding a public market;
is a kind of day

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, bear market, bissextile day, black market, boxing day, break of day, break of the day, bull market, buyer's market, buyers' market, 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, commodities market, common market, commonwealth day, curb market, 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, farmer's market, fast day, father's day, feast day, fete day, field day, flag day, flea market, flood the market, food market, forever and a day, forward market, future day, futures market, gain the day, good day, gray market, green market, grey market, 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, labor market, lady day, lammas day, last day, leap day, lord's day, lunar day, major fast day, market, market analysis, market analyst, market capitalisation, market capitalization, market cross, market economy, market forces, market garden, market gardening, market keeper, market letter, market order, market penetration, market price, market research, market square, market strategist, market town, market value, martin luther king day, may day, mean solar day, meat market, memorial day, michaelmas day, midsummer day, midsummer's day, minor fast day, money market, 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, open market, open-air market, order of the day, otc market, over-the-counter market, pan american day, pancake day, patriot's day, patriots' day, pioneers' day, play the market, 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, securities market, seize the day, seller's market, sellers' market, sidereal day, six day war, slave market, soft market, solar day, speech day, spot market, st john's day, st martin's day, st patrick's day, st valentine's day, stock market, stock market index, 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, working day