| 1st September | .
|
| 2nd September | World Coconut Day
|
| 3rd September | .
|
| 4th September | .
|
| 5th September | Indian Teacher`s Day
|
| 6th September | .
|
| 7th September | National Labour Day USA
|
| 8th September | International Literacy Day
|
| 9th September | .
|
| 10th September | World Suicide Prevention Day
|
| 11th September | .
|
| 12th September | World First Aid Day, International Day for South-South Cooperation
|
| 13th September | World Chocolate Day
|
| 14th September | Hindi Diwas
|
| 15th September | Engineers` Day (India), International Day of Democracy
|
| 16th September | Ozone Day
|
| 17th September | .
|
| 18th September | .
|
| 19th September | International Talk Like a Pirate Day, International Red Panda Day
|
| 20th September | .
|
| 21th September | International Day of Peace, World Alzheimer's Day
|
| 22th September | World Car Free Day
|
| 23th September | .
|
| 24th September | World Maritime Day
|
| 25th September | .
|
| 26th September | CSIR Foundation Day
|
| 27th September | World Tourism Day
|
| 28th September | World Rabies Day, World Deaf Day, Gunners Day(India)
|
| 29th September | World Heart Day
|
| 30th September | International Translation Day
|
 |
|
