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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 31 December 2100. It is the first century of the 3rd millennium.
It's the year 2100, and we're at the dawn of the 22nd century. Yep, that's what's coming next: the 22nd century. Its years will all* start with 21, proceeding up to the distant 2199. And as we all know, we're currently in the 21st century, but the years start with 20.
2020 or 2021: When did the decade start? The 21st Century Started in 2001. In 1999, the world was preparing for the New Year's party of a lifetime. The year number in the Gregorian calendar was about to tick over to 2000, supposedly ushering in not only the 21st century but also the 3rd millennium CE.
November 11: The FTX cryptocurrency exchange files for Chapter 11 bankruptcy. November 15: The world population is estimated to have reached 8 billion. November 16: NASA launches Artemis 1, the first uncrewed mission of its Space Launch System, the most powerful rocket ever to reach orbit.
- Smartphones Are Everywhere. What did we ever do before the invention of the smartphone? KARRASTOCK/Getty Images. Apple rolled out its first smartphone — a hand-held computer and mobile phone mashed into one — in 2007.
- Social Media Sites Take Off. With the handiness of a computer in our pockets, social media became the method of communication for billions around the world.
- We Now Connect Via WiFi. "We stand," declared Wired magazine in 2003, "at the brink of a transformation." The article was titled "The Wi-Fi Revolution," and the technology, indeed, was ground-shaking.
- Memes and Emojis Spread Like Wildfire. Memes, like "the distracted boyfriend," are now part of our everyday lexicon. Wikimedia. That smiley face, that shrugging guy, the finger gun, the tears of joy.
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When did the 21st century start?
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World Facts. The 10 Most Important Events In The 21st Century. The beginning of the 21st century will be remembered by global concerns over terrorism, global warming, the rise of the global economy, and private enterprises.
21st Century. The 21st century saw the dawn of the war on terrorism, as the 9/11 attacks and the Boston Marathon bombing dramatically changed society. Economic issues moved to the forefront...
