September in the Southern Hemisphere is the seasonal equivalent of March in the Northern Hemisphere. In the Northern hemisphere, the beginning of the meteorological autumn is 1 September. In the Southern hemisphere, the beginning of the meteorological spring is 1 September.
In Latin, septem means “seven” and septimus means “seventh”; September was in fact the seventh month of the Roman calendar until 153 BC, when the first month changed from Kalendas Martius (1 March) to Kalendas Januarius (1 January).
September marks the beginning of the ecclesiastical year in the Eastern Orthodox Church.
September begins on the same day of the week as December every year, because there are 91 days separating September and December, which is a multiple of seven (the number of days in the week). No other month ends on the same day of the week as September in any year.
September Historical Dates
September General Observances
National Preparedness Month
National Chicken Month
Pet Smile Month
Senior Care Health Month [Iams, Pfizer, Animal Health]
World Animal Remembrance Month
September 5 National Hummingbird Day (1st Saturday)
September 7 Google Commemoration Day
September 8 International Literacy Day
September 10 World Suicide Prevention Day
September 11 World First Aid Day
September 13 National Pet Memorial Day (2nd Sunday) [International Association of Pet Cemeteries]
September 19 International Talk Like a Pirate Day
September 19 Responsible Dog Ownership Day (3rd Saturday) [American Kennel Club]
September 21 International Day of Peace
September 22 (World) Car Free Day
September 26 International Rabbit Day (4th Saturday)
September 27 World Tourism Day
September 28 World Rabies Day U.S. Centers for Disease Control
September 29 National Goose Day
September 29 International Hug A Gamer Day