Nov 6, 2026Discover why the era from 2001 to 2100 is called the 21st century, based on the Gregorian calendar and historical century naming conventions.

Nov 6, 2026Discover why 1999 and 2000 belong to different centuries and how the Gregorian calendar counts centuries.

Nov 5, 2026Discover why the year 2000 is considered the turn of the century and when the 21st century officially began.

Nov 5, 2026Learn why the 20th century is from 1901-2000 and why the 2000s mark the 21st century, based on how centuries are counted.

Nov 3, 2026Discover why the year 2000 is considered the last year of the 20th century, not the first of the 21st century, according to the Gregorian calendar.

Jul 30, 2026Learn about the calendar change from the Julian to Gregorian system starting in 1582, its reasons, and how Europe transitioned by the 20th century.

Jul 13, 2026Learn why the current era is called the 21st century and how the Gregorian calendar defines centuries from 2001 to 2100.