
What Happens During a Leap Year? Understanding February 29th
Learn what a leap year is, why we add February 29th every four years, and how it keeps our calendar in sync with the seasons.

Understanding Leap Years: What is the Difference Between 365 Days and 366 Days?
Learn the key differences between 365-day regular years and 366-day leap years, and why we need leap years for our calendar system.