Decades—periods of ten years—begin when the year count ticks over from a year ending with 9 to a year ending with 0. For example, New Year's Day 1980 marked the beginning of the eighties.
2020 is like 1616, 1717, 1818, and 1919, because the first two digits match the second two digits. Being alive in 2020 is special because that is the only year you are likely to live through wherein the first two digits will match the second two digits. The next year that follows this pattern is 2121.
"Really, a decade begins actually with the year ending in the numeral one," Sandi Duncan, the managing editor of the "Farmer's Almanac" told NPR. "There was never a year zero. So when we started counting time way back when, it goes one through 10. So a decade is 10 years.
2019 (MMXIX) was a common year starting on Tuesday of the Gregorian calendar, the 2019th year of the Common Era (CE) and Anno Domini (AD) designations, the 19th year of the 3rd millennium, the 19th year of the 21st century, and the 10th and last year of the 2010s decade.
Decade: Ten (10) years. Century: One hundred (100) years. Millennium: One thousand (1,000) years.
20 predictions for 2020: Here's what people said would happen by this year
- Life expectancy will rise past 100.
- Computers will be invisible.
- Books will be dead.
- Your every move will be tracked.
- World's population will reach 8 billion.
- China will be the world's largest economy.
- We'll have self-driving cars.
"The year 2020 will be remembered as a turnaround point in human history," writes Marcelo Gleiser for CNN Opinion. "Not just because many will die, but because the Covid-19 pandemic is offering us a chance to reinvent ourselves."
What do you call the 2010s? (The decade from 2010 to 2019?) - CSMonitor.com.
The 2020s (pronounced "twenty-twenties", shortened to "the '20s") is the current decade in the Gregorian calendar which began on 1 January 2020 and will end on 31 December 2029.
The year zero does not exist in the Anno Domini (AD) system commonly used to number years in the Gregorian calendar and in its predecessor, the Julian calendar.
Originally Answered: Why are the years of the 2000s called the 21st century, instead of the 20th century? Because 0–99 was the first century so 2000–2099 is the 21st century.
We live in the 21st Century, that is, the 2000s. Similarly when we say "20th Century," we are referring to the 1900s. All this because, according to the calendar we use, the 1st Century included the years 1-100 (there was no year zero), and the 2nd Century, the years 101-200. Similarly, when we say 2nd Century B.C.E.
Latin-derived numerical names
| Anniversary | Latin-derived term | Other terms |
|---|
| 14 years | Quattuordecennial | Ivory |
| 15 years | Quindecennial | Crystal |
| 20 years | Vigintennial / Vicennial | China/Porcelain |
| 25 years | Quadranscentennial | Silver jubilee |
The 20th Century consists of the years 1901 through 2000 and will end Dec. 31, 2000. The 21st Century will begin Jan. 1, 2001.”
Their argument is rooted in a fundamental fact: the Anno Domini system used to number years in the Gregorian calendar has no year zero. This means the counting for years began at one. This means the first decade went from January 1, 1 to December 31, 10.
What year is the first century?
When did the 21st century end?
January 1, 2001 – December 31, 2100
