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Roto-annual

An event occurring once every two years, or every other year. An alternative to the often confusing bi-annually, which means twice a year.
I was heading to the roto-annual Furcon in Baltimore, when all of the sudden the sandwich vendor ate a bird.
by Quhlena April 21, 2025
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National Unus Annus Day

National Unus Annus Day is on November 14th, where fans of the deleted channel "Unus Annus" celebrate by wearing the merchandise from it or wearing either all black or all white. Unnus Annus was a channel made by Markiplier and Crankgameplays and then deleted on November 14th. the channel only went on for a year to give a message about how you can never stop the clock and to remember that everything comes to an end.
girl: hey guess what today is
boy: what is it?
girl: its National Unus Annus Day!
by boriacow November 16, 2020
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National Unus Annus Day

Today is the day that Unus Annus died and today we wear Black and White to remember them Momento Mori is rember death in latin and Unus Annus is one year in latin
Person 1: Unus
Person 2: Annus

Person 1: Momento

Person 2: Mori

Person 1: Unus Annus
Person 2: Momento Mori

Person 1: it's National Unus Annus Day
by Goosey_Games123 November 17, 2020
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The 9th Annual Vanilla Level Design Contest

The 9th Annual Vanilla Level Design Contest was great!
by HaMufin December 29, 2021
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