What is what day is september 1st?

September 1st marks the beginning of September and is the 244th day of the year (245th in leap years) in the Gregorian calendar.

• Historically, it is associated with the Start%20of%20the%20School%20Year in many countries.
• In some cultures, it is observed as a Day%20of%20Knowledge, celebrating education and learning.
• It also sometimes coincides with the Start%20of%20Meteorological%20Autumn in the Northern Hemisphere, although the astronomical autumn starts later.
• World Peace%20Day petitions often are sent to various governments.