All About September

September is the ninth month of the year in the Gregorian calendar, with 30 days. Its name comes from the Latin word “septem,” meaning seven, as it was originally the seventh month in the ancient Roman calendar. September marks the beginning of autumn in the Northern Hemisphere and spring in the Southern Hemisphere, signaling seasonal transitions around the world.

September Quick Facts

• Month Number: 9th month of the year
• Number of Days: 30
• Season (Northern Hemisphere): Autumn (begins with the Autumn Equinox)
• Season (Southern Hemisphere): Spring (begins with the Spring Equinox)
• Birthstone: Sapphire
• Birth Flower: Aster and Morning Glory
• Zodiac Signs: Virgo (until September 22) and Libra (from September 23)

Notable September Events & Holidays

• September 5: International Day of Charity
• September (first Monday): Labor Day (U.S. and Canada)
• September 8: International Literacy Day
• September 21: International Day of Peace
• September 22 or 23: Autumn/Spring Equinox (date varies slightly by year)
• September 27: World Tourism Day
• September (variable): Back to School (in many Northern Hemisphere countries)
• September (variable): Rosh Hashanah and Yom Kippur (Jewish, dates vary by year)
• September is also: National Preparedness Month, World Alzheimer’s Month, and National Hispanic Heritage Month (September 15-October 15 in the U.S.)