| March 1st
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| March 2nd
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| March 3rd
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- I Want You to be Happy Day
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| March 4th
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| March 5th
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| March 6th
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| March 7th
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- World Day of Prayer
- National Be Heard Day
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| March 8th
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- International Working Women's Day
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| March 9th
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| March 10th
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- National Workplace Napping Day (The first Monday after Daylight Savings Time)
- Middle Name Pride Day
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| March 11th
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| March 12th
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| March 13th
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- Jewel Day
- Ear Muff Day
- National Open an Umbrella Indoors Day
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| March 14th
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- Pi Day
- National Potato Chip Day
- Save a Spider Day'
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| March 15th
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- Everything You Think is Wrong Day
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| March 16th
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- Everything You Do is Right Day
- Freedom of Information Day
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| March 17th
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- St. Patrick's Day
- Submarine Day
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| March 18th
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- National Biodiesel Day
- Supreme Sacrifice Day
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| March 19th
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- Poultry Day
- Act Happy Day
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| March 20th
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- Proposal Day
- Absolutely Incredible Kid Day (Always the third Thursday in March)
- Extraterrestrial Abductions Day
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| March 21st
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- Fragrance Day
- Good Friday
- National Single Parent Day
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| March 22nd
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| March 23rd
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| March 24th
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- Dyngus Day(always the Monday after Easter)
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| March 25th
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- Pecan Day
- Tolkien Reading Day
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| March 26th
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- Make up Your Own Holiday Day
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| March 27th
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- National Joe Day
- Kite Flying Day
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| March 28th
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- Something on a Stick Day
- Respect Your Cat Day
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| March 29th
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- Smoke & Mirrors Day
- National Mom and Pop Business Owners Day'
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| March 30th
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| March 31st
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- National Clam on the Half Shell Day
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