calendar year

A calendar year is the total period it takes for the Earth to complete one full orbit around the Sun, which is approximately 365 days. To keep the calendar aligned with this cycle, we traditionally add an extra day, February 29, during a leap year every four years. This system ensures our calendar reflects the Earth's actual position in its orbit, allowing seasons and months to stay consistent over time. The concept of a calendar year helps organize time for daily activities, planning, and historical record-keeping.