A leap year is a year that is divisible by 4, with the exception of years divisible by 100 unless they are also divisible by 400. This adjustment ensures that our calendar year stays synchronized with the Earth's revolutions around the Sun, correcting for the fact that a solar year is approximately 365.24 days long.

Leap Year Calculation

A leap year is a year that is divisible by four, with the exception of years that are divisible by 100 unless they are also divisible by 400, to synchronize the calendar year with the astronomical year. This adjustment compensates for the fact that a solar year is approximately 365.2425 days long, preventing calendar drift over time.

leap year

Year divisible by 4

years divisible by 100

Years divisible by 400

A calendar year is a one-year period that begins on January 1st and ends on December 31st, used for organizing schedules, events, and accounting in most of the world. It aligns with the Gregorian calendar, which is the internationally accepted civil calendar, and plays a crucial role in timekeeping, planning, and cultural observances.

calendar year

Earth's revolutions

The Sun is the central star of our solar system, providing the energy necessary to support life on Earth through nuclear fusion. Its gravitational pull keeps planets, moons, and other objects in orbit, making it fundamental to the structure and dynamics of our planetary system.

A solar year, also known as a tropical year, is the time it takes for the Earth to complete one orbit around the Sun, measured relative to the equinoxes, averaging about 365.242 days. This period is fundamental to the Gregorian calendar, which is designed to align with the solar year to ensure seasonal consistency over long periods.

Relevant Degrees

Your Lessons