| 106651 | September 17 | Death | 2013 – Marvin Rainwater, American singer-songwriter (b. 1925) |
| 106652 | September 17 | Death | 2013 – Eiji Toyoda, Japanese businessman (b. 1913) |
| 106653 | September 17 | Death | 2014 – Street Cry, Irish race horse (b. 1998) |
| 106654 | September 17 | Death | 2014 – George Hamilton IV, American singer-songwriter and guitarist (b. 1937) |
| 106655 | September 17 | Death | 2014 – Andriy Husin, Ukrainian footballer and manager (b. 1972) |
| 106656 | September 17 | Death | 2014 – Wakachichibu Komei, Japanese sumo wrestler (b. 1939) |
| 106657 | September 17 | Death | 2014 – Elaine Lee, South African-Australian actress (b. 1939) |
| 106658 | September 17 | Death | 2014 – Charles Read, Australian air marshal (b. 1918) |
| 106659 | September 17 | Death | 2014 – Peter von Bagh, Finnish historian, director, and screenwriter (b. 1943) |
| 106660 | September 17 | Death | 2014 – China Zorrilla, Uruguayan actress, director, and producer (b. 1922) |
| 106661 | September 17 | Death | 2015 – Ingrīda Andriņa, Latvian actress (b. 1944) |
| 106662 | September 17 | Death | 2015 – Dettmar Cramer, German footballer and manager (b. 1925) |
| 106663 | September 17 | Death | 2015 – Milo Hamilton, American sportscaster (b. 1927) |
| 106664 | September 17 | Death | 2015 – Vadim Kuzmin, Russian physicist and academic (b. 1937) |
| 106665 | September 17 | Death | 2015 – David Willcocks, English organist, composer, and conductor (b. 1919) |
| 106666 | September 17 | Holiday and observance | Christian feast day:Albert AvogadroAriadne of PhrygiaBlessed Cecilia EusepiBlessed Stanislaus PapczyńskiHildegard of BingenLambertRobert BellarmineSatyrus of MilanSocrates and StephenZygmunt Szczęsny FelińskiSeptember 17 (Eastern Orthodox liturgics) |
| 106667 | September 17 | Holiday and observance | Australian Citizenship Day |
| 106668 | September 17 | Holiday and observance | Constitution Day (United States) (observed on the previous Friday if it falls on a Saturday, the following Monday if on a Sunday) |
| 106669 | September 17 | Holiday and observance | Heroes' Day (Angola) |
| 106670 | September 17 | Holiday and observance | Marathwada Liberation Day (India) |
| 106671 | September 17 | Holiday and observance | National Apple Dumpling Day (United States) |
| 106672 | September 17 | Holiday and observance | Operation Market Garden Anniversary is still remembered with parachuting and dedications on this day. (Netherlands) |
| 106673 | September 17 | Holiday and observance | Teachers' Day (Honduras) |
| 106674 | September 17 | Holiday and observance | Von Steuben Day. (United States), weekend of the week of September 17. |
| 106675 | September 18 | Event | 96 – Nerva is proclaimed Roman emperor after Domitian is assassinated. |
| 106676 | September 18 | Event | 324 – Constantine the Great decisively defeats Licinius in the Battle of Chrysopolis, establishing Constantine's sole control over the Roman Empire. |
| 106677 | September 18 | Event | 1180 – Philip Augustus becomes king of France. |
| 106678 | September 18 | Event | 1454 – In the Battle of Chojnice, the Polish army is defeated by the Teutonic army during the Thirteen Years' War. |
| 106679 | September 18 | Event | 1502 – Christopher Columbus lands at Honduras on his fourth, and final, voyage. |
| 106680 | September 18 | Event | 1618 – The twelfth Baktun in the Mesoamerican Long Count calendar begins. |