Why does it take 365 days and quarter for the earth to go around the Sun cant it just be one year?

The Earth takes approximately 365.25 days to complete one orbit around the Sun due to its elliptical path and the gravitational forces at play. This period is defined as a year, but to keep our calendar year aligned with the Earth's position relative to the Sun, we incorporate an extra day every four years (leap year). Thus, while we refer to it as one year, the additional quarter day accounts for the precise timing of Earth's orbit.