| Date | Event |
|---|---|
| May 09 1911 | D'Annunzio's Work In Vatican's Forbidden Books |
| May 15 1911 | Court Declares Standard Oil Unreasonable |
| May 15 1911 | Mexican Forces Take Torreon Killing 308 Immigrants |
| May 19 1911 | Parks Canada Established |
| May 21 1911 | Mexican Revolution Ends With Treaty Of Juarez |
| May 23 1911 | The New York Public Library Is Dedicated |
| May 30 1911 | Ray Harroun Wins First Indianapolis 500 |
| May 31 1911 | The Titanic's Hull Is Launched |
| May 31 1911 | Mexican President Diaz Flees During Revolution |