Jul 29, 2026Learn how centuries are calculated by grouping years into sets of 100, with examples like why 2023 is in the 21st century.

Jul 10, 2026Learn how to calculate centuries from years, including a simple formula to determine the century for any given year.

Jun 21, 2026Learn how centuries are counted, from the 1st century starting in year 1 to the 21st century spanning 2001-2100, and why this system matters.