The annoying ass people who don’t stop insisting that the new decade begins in 2021, and not 2020. These are the same people who complained in the late ‘90s that the new millennium doesn’t begin until 2001 (Even though 2000 was a bigger deal than 2001) and that the 2010s “isn’t” a proper decade, and that it began in 2011 and ends in 2020 (Or ended if you’re post reading this post 2020).

Usually a Sci-Fi fan, the type of people that loves Star Wars, Geeky, and most of the time, have no friends.
Joe: Sends his five friends invites to his new decade party that is held on December 31, 2019.
Toby replies to Joe: The decade doesn’t begin until 2021.

Joe disinvites Toby after realizing he’s a calendar pedant.
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An annoying person, usually a nerd or Sci-Fi fan, who joyful informs other people that the new century, and millennium did not begin until January 1, 2001, despite nobody caring for the Gregorian calendar’s reckoning anymore and that for decades society used the ‘70s, ‘80s, and ‘90s conventions rather than the 198th (1971-1980), 199th (1981-1990), and 200th (1991-2000) decades set up by a calendar that although used in almost every country, in fact, started off with the incorrect date of the birth of Jesus. Basically, if it weren’t for Christ, this year wouldn’t be 2019 (Or whatever year you’re reading this). The year 1 was suppose to be the birth of Jesus but know most scholars agree that it’s wrong and he was before prior to 1 AD/CE.

We stopped using the old out-of-use calendar decades (For example, the 203rd decade is a calendar decade that runs from 2021-2030, yet almost everybody never uses that anymore and instead switched to the popular reckoning of decades that makes the 2020s and runs from 2020-2029) almost a century ago. For the millennium, we were celebrating the arrival of the 2000s; not the 3rd calendar millennium (2001-3000) which is very old and we switched to the millennia of the 0s (1-999), 1000s (1000-1999), 2000s (2000-2999), and 3000s (3000-3999).

In the late 1990s, Pedants told everyone that the new millennium doesn’t begin until 2001, even though everyone ignored them.
(December 31, 1999)

Joe is having a millennium party, so he invited many guests to celebrate the arrival of the year 2000. Toby however, is a calendar pedant.

Joe: Everyone, May I have your attention please. As you all know, the new millennium is about to come and—-
Toby: Well the new millennium doesn’t actually begin until 2001.

(Joe gets angry at Toby and decides to kick him out after realizing he’s a Calendar Pedant).
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