| Year | Month | Day | Event |
|---|---|---|---|
| 1837 | Mar | 04 | The City Of Chicago Is Incorporated |
| 1892 | Jun | 06 | Operation Of The Chicago L Begins |
| 1904 | Jan | 08 | Blackstone Library - 1st Chicago Public Library Is Dedicated |
| 1914 | Apr | 23 | Baseball Was Played On Wrigley's Field |
| 1920 | Feb | 14 | League Of Women Voters Founded |
| 1921 | Oct | 26 | The Chicago Theatre Opens |
| 1933 | May | 27 | Chicago: World's Fair Opens |
| 1937 | May | 30 | Chicago Police Kill 10 On Memorial Day |
| 1943 | Mar | 19 | Frank Nitti Commits Suicide In A Railway |
| 1946 | Jun | 05 | 61 Killed In La Salle Hotel Fire |
| 1950 | May | 25 | Chicago Surface Lines Streetcar Crashes |
| 1969 | Sep | 23 | Chicago Trial Opens |
| 1969 | Oct | 08 | Days Of Rage Was Organized By Weather Underground |
| 1973 | May | 03 | 108 Story Sears Tower: World's Tallest Building |
| 1982 | Sep | 29 | Seven Chicagoans Die In Tylenol Poisonings |
| 1987 | Nov | 22 | Two Chicago TV Stations Are Hijacked By Impersonated Max Headroom |
| 2006 | May | 15 | Cloud Gate Dedicated In Millenium Park |