1905 | First Rotary Club met in Chicago, Illinois, USA. |
| 1907 | First Community Service Project, "Public Comfort Station", Chicago. |
| 1908 | Second Rotary Club organised in San Francisco, California, USA. |
| 1909 | Rotary Wheel adopted. |
| 1910 | First Rotary Club outside USA formed in Winnipeg, Manitoba, Canada. |
| 1910 | First International Convention, Paul Harris becomes 1st President and Chisley R Perry, 1st Secretary
(continued for 32 years). |
| 1910 | Paul Harris married to Jean Thomson. |
| 1910 | Rotary becomes International - 1st Convention in Chicago. |
| 1911 | The NATIONAL ROTARIAN (forerunner of "The Rotarian") launched; clubs formed in Dublin, Ireland,
London, England and Belfast, Northern Ireland. |
| 1912 | Rotary becomes "International Association of Rotary Clubs". |
| 1917 | Endowment Fund, forerunner of TRF formed. |
| 1917 | First International Assembly. |
| 1919 | Rotary entered South America, with clubs in Montevideo, Uruguay and Asia with clubs in Manila and
Calcutta, India. |
| 1921 | Rotary entered Continental Europe, with clubs in Madrid, Spain and entered two more continents with
clubs in Melbourne (Australia) and Johannesburg. |
| 1926 | Four avenues introduced. |
| 1928 | Provision made for endowment fund for a Rotary Foundation. |
| 1928 | "The Rotary Foundation" established by RI President Arch C Clump. |
| 1933 | Four way test introduced by a Chicago Rotarian Herbert J Taylor. |
| 1941 | Youth Service avenue introduced. |
| 1945 | 49 Rotarians helped to draft United Nation Charter in San Francisco. |
| 1947 | Paul P Harris, the founder of Rotary, died. The first Rotary Foundation Scholarship awarded. |
| 1962 | First Interact Club formed in Melbourne, Florida, USA. |
| 1963 | Jean Harris passed away. |
| 1965 | TRF Launches Matching Grant Program and Group Study Exchange Program. |
| 1968 | First Rotaract Club formed in Charlotte, North Carolina, USA. |
| 1971 | RYLA accepted as a recognised Youth Program. |
| 1978 | The Health, Hunger and Humanity program was initiated to commemorate 75th Anniversary coming in 1980 . |
| 1980 | Rotary's 75th Anniversary, on 23rd February. |
| 1985 | Polio Plus Program initiated. |
| 1986 | Millionth Member admitted to Rotary in February. |
| 1987 | First Woman admitted to Rotary in USA. |
| 1988 | Rotary declares Eradication of Polio as Centennial Project. |
| 1989 | Rotary returns to Eastern Europe. |
| 1989 | COL endorses admission of women. |
| 1991 | Last case of Polio in America - Louis Fermin (Peru). |
| 1992 | 75th Anniversary of the Rotary Foundation and the International Assembly. |
| 1994 | Western Hemisphere declared Polio Free. |
| 1995 | India's First National Immunisation Day. |
| 1997 | Last case of Polio in Western Pacific - Mum Chanty. |
| 1997 | The new District Leadership Plan came into being (creating Asst Governors etc.). |
| 1999 | Rotary Centres for International Studies, Peace & Conflict Resolution established. |
| 2000 | Western Pacific Region of WHO including China certified Polio Free. |
| 2003 | Centenary Celebration Planning begun. |
| 2004 | Centennial Projects initiated and Centennial Bell started its journey. |