When is september in months

Create Your Calendar

Each month has either 28, 30, or 31 days during a common year, which has 365 days.

During leap years, which occur nearly every 4 years, we add an extra (intercalary) day, Leap Day, on 29 February, making leap years 366 days long.

This is to keep our current calendar aligned with the solar year and astronomical seasons marked by equinoxes and solstices.

The 12 Months

The Gregorian calendar consists of the following 12 months:

1. January - 31 days
2. February - 28 days in a common year and 29 days in leap years
3. March - 31 days
4. April - 30 days
5. May - 31 days
6. June - 30 days
7. July - 31 days
8. August - 31 days
9. September - 30 days
10. October - 31 days
11. November - 30 days
12. December - 31 days

Tracking the Moon’s Orbit

The months originated as a way to mark time and break up the year into shorter periods based on the Moon’s orbit around Earth.

The word month is even derived from the word Moon.

As far as we know, months were first used in Mesopotamia sometime between the years 500 BCE and 400 BCE to measure the natural pe

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