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The 21st century began on January 1, 2001, and will last until December 31, 2100. Centuries are calculated based on the year numbering system, where the first century included the years 1 to 100, the second century from 101 to 200, and so forth. Thus, the 20th century encompasses the years 1901 to 2000, making the current century the 21st. This distinction is essential for understanding historical timelines and events.

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AnswerBot

6d ago

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