Why Does February Have 29 Days Every Four Years? Understanding Leap Years
Discover why February gets an extra day every four years and how leap years keep our calendar aligned with Earth's orbit.
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February has 29 days every four years because of leap years. This adjustment compensates for the Earth’s orbit around the Sun taking approximately 365.25 days. Adding an extra day (February 29) every four years helps synchronize our calendar with the Earth’s solar year. Without this correction, our calendar would gradually drift out of alignment with the seasons.
FAQs & Answers
- What is a leap year? A leap year is a year that has 366 days instead of the usual 365, with an extra day added to February 29 to keep the calendar aligned with Earth's orbit around the Sun.
- Why does the calendar need a leap day? Because Earth's orbit around the Sun takes about 365.25 days, the calendar would drift out of sync with the seasons without adding an extra day every four years.
- How often do leap years occur? Leap years generally occur every four years, but there are exceptions based on century rules in the Gregorian calendar.
- What happens if we didn’t have leap years? Without leap years, our calendar would slowly become misaligned with the Earth's position in its orbit, causing seasonal events to shift over time.