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When Does the New Decade Really Begin, 2020 or 2021?



New Year 2020 2021 | When Does the New Decade Really Begin, 2020 or 2021? | Featured
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According to the Farmers' Almanac, there's debate about when the current decade ends and a new one begins. Some argue this decade ends next week, on Dec. 31, 2019, and the start of a new decade begins on Jan. 1, 2020. Others, however, say the new decade doesn't start until Jan. 1, 2021; the old one concluding on Dec. 31, 2020.

But Which is Correct?

As you think about New Year's resolutions, here's one we should all make together: Resolve to insist that decades begin with the year ending in the numeral 1 and finish with a 0. For a decade to begin, we must start with the year ending with 1 (2021) and finish with 10, or so far as chronology is concerned, a year ending in 0 (2030).

For example, Jan. 1, 2001, opened the 21st century and the start of the new millennium, just as the year 1 A.D. marked the beginning of the Christian era. Of course, many of us will remember the wild celebrations that were touched off at midnight on Dec. 31, 1999. But was that a year too soon? Yes!

That fact was known even to comedian Jerry Seinfeld. And if at the stroke of midnight on Dec. 31, you think you'll be celebrating the start of a new decade, guess again. As was the case 20 years ago, you'll be one year early, for the new decade will actually start in the year 2021.

Calendrical Confusion

If you want to criticize anybody for this confusion, you can point the finger of blame at two men: Dionysius Exiguus, also known in some reference works as “Dennis the Short,” and the Northumbrian monk Bede, also known as the “Venerable Bede.”

Dionysius was born in what we now call Romania around the year 470 and was the first to suggest counting the passage of the years from the date of the birth of Jesus Christ; the beginning of the anno Domini (which means “Year of Our Lord” in Latin) era, or A.D.

According to the contemporary historians of the time, Jesus was born during the 28th year of the reign of the Roman Emperor, Caesar Augustus. There is, however, considerable confusion about exactly when Augustus' reign began, so the year Dionysius called 1 A.D. was not accurately placed in history; in fact, most religious scholars now think that Jesus might actually have been born several years earlier.

When Dionysius finished his computations, he figured that the year Christ was living in was 525 A.D. But he never bothered to number the years prior to Christ's birth.

We would have to wait until 731 A.D., when the Venerable Bede popularized the anno Domini era in Anglo-Saxon England and extended the counting of years before the birth of Christ – the “B.C. era.”

Most unfortunately, however, Bede did not account for the year zero in his calculations. So 1 A.D. was immediately preceded not by a 0, but by 1 B.C.

The Elevator Analogy

Think of going into a building in which the ground floor is listed not as the first floor, but as the lobby. So the first floor is actually one flight above you.

So if you were to go into an elevator located in the lobby and wanted to go 10 flights up, you would actually end up on the ninth floor (if you were to assume that the lobby as the “zero” floor).

But if you assume the lobby as the “first” floor and went 10 flights up, you would end up on the tenth floor.

In essence, on our calendars, 2021 is the equivalent of a “first-floor lobby,” and after going up ten flights (or years), we'll arrive at the tenth floor. Or in this case, the year 2030-when that decade ends.

So while it may not be the end of the decade, that doesn't mean you can't celebrate the arrival of 2020.

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  • Frosty says:

    I use the simple example that when you count on your fingers, you put up one finger and say ONE, not zero. Then two, etc. This way you end on 10 which ends with a zero. Elevators and floors of buildings gets way to complicated because some buildings leave out the 13th floor, so what then? (rhetorical) Also you have mezzanines in some buildings which actually give you another floor, or half floor. It’s too early to start drinking, so I’ll use my fingers.

  • PAUL M MCCALIB says:

    this debate has been going on for centuries, orientals count their age as being one year old at birth, so their first birthday celebration is for being two years old.
    The western world did not have zero in its math. Always started at 1 and a decade was 1 to ten. So to me the next decade starts at 2021.

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