💞 People & Relationships
National Twin Day
Dec 18
National Twin Day on December 18 celebrates twins and the special bond they share. Learn twin facts, the science of identical vs.…
December 18, 2026: National Days & Holidays
December 18 is National Twin Day, plus 3 more. Here’s everything celebrated on this date.
4observances on this date
352ndday of 2026 (out of 365)
13days left in 2026
🎉 Holidays & Traditions
National Ugly Christmas Sweater Day
Dec 18
National Ugly Christmas Sweater Day falls on the third Friday of December. Learn how tacky holiday sweaters became a beloved trend and…
🤝 Awareness & Causes
International Migrants Day
Dec 18
International Migrants Day on December 18 recognizes the contributions and rights of migrants worldwide. Learn its history and key facts about migration.
📜 Education & History
Arabic Language Day
Dec 18
Arabic Language Day on December 18 celebrates one of the world's most widely spoken languages. Learn its history, script and words English…
December 18 at a glance
- What national days are on December 18, 2026?
- December 18, 2026 has 4 observances: National Twin Day, National Ugly Christmas Sweater Day, International Migrants Day and Arabic Language Day.
- What day of the year is December 18?
- December 18 is the 352nd day of 2026, out of 365 days.
- How many days are left in the year after December 18?
- There are 13 days left in 2026 after December 18.
- What day of the week is December 18, 2026?
- December 18, 2026 falls on a Friday.
Key dates in December 2026
More in December
December 2026
SunMonTueWedThuFriSat1World AIDS DayRosa Parks Day+12National Mutt DayNational Special Education Day+13International Day of Persons with DisabilitiesNational Roof Over Your Head Day+14National Cookie DayNational Sock Day+15International Volunteer DayWorld Soil Day+16St. Nicholas DayNational Miners Day+17National Pearl Harbor Remembrance DayNational Cotton Candy Day+18Feast of the Immaculate ConceptionBodhi Day+19National Pastry DayNational Llama Day+110Human Rights DayDewey Decimal System Day+111International Mountain DayNational App Day+112Feast of Our Lady of GuadalupeNational Gingerbread House Day+113St. Lucia DayNational Cocoa Day+114Monkey DayNational Bouillabaisse Day+115International Tea DayBill of Rights Day+116Las Posadas (begins)Boston Tea Party Day+117SaturnaliaNational Maple Syrup Day+118National Twin DayNational Ugly Christmas Sweater Day+219National Emo DayNational Hard Candy Day+120National Sangria DayInternational Human Solidarity Day+121Winter SolsticeYule+222Forefathers’ DayNational Short Girl Appreciation Day+123FestivusNational Pfeffernüsse Day+124Christmas EveFeast of the Seven Fishes+125Christmas DayNational Pumpkin Pie Day+126Kwanzaa (begins)Boxing Day+227National Fruitcake DayInternational Day of Epidemic Preparedness+128Holy Innocents’ DayPledge of Allegiance Day+129Tick Tock DayNational Pepper Pot Day+130National Bacon DayNational Bicarbonate of Soda Day+131New Year’s EveHogmanay+1