
21st century - Wikipedia
The 21st century is the current century in the Anno Domini or Common Era, in accordance with the Gregorian calendar. It began on 1 January 2001 (MMI), and will end on 31 December 2100 (MMC). It …
The 21st Century and the 3rd Millennium - United States Navy
By extrapolation, the 20th century comprises the years AD 1901-2000. Therefore, the 21st century began on 1 January 2001 and will continue through 31 December 2100.
21st century Definition - AP US History Key Term | Fiveable
The 21st century is the current century, spanning the years 2001 to 2100, characterized by rapid technological advancements, globalization, and significant geopolitical changes.
21st century: Significance and symbolism - Wisdom Library
Dec 10, 2025 · The 21st century refers to the current era that began on January 1, 2001, and is expected to end on December 31, 2100. This century is marked by significant advancements in …
XX-XXI century or XX-XXI centuries? - TextRanch
Mar 20, 2024 · Learn the correct usage of "XX-XXI century" and "XX-XXI centuries" in English. Discover differences, examples, alternatives and tips for choosing the right phrase.
How to Write Centuries & Decades — Tips for Academic Documents
So would you write the twenty-first century, 21st century, 2010s, 2010’s, or 21st Century? There are a number of options, but some of those would be incorrect.
21st Century In Roman Numerals, how to write?
Your question is, " What is the 21st Century in Roman Numerals? ", and the answer is ' XXI '. Here we will explain how to convert and write the 21st Century in the correct Roman numeral figures.
21st Century in Roman Numerals
The 21st Century, written as XXI in Roman numerals, spans from 2001 to 2100. It defines the age of technology, connectivity, and innovation, where digital evolution, artificial intelligence, and …
21st century - Wikiwand
The 21st century is the current century in the Anno Domini or Common Era, in accordance with the Gregorian calendar. It began on 1 January 2001 and will end on ...
Centuries and How to Refer to Them - Merriam-Webster
And as we all know, we're currently in the 21st century, but the years start with 20. And in the 20th century, they all started with 19, and in the 19th, with 18, and so on.