Events
| US/the World | A Peace Conference aimed at ending the German-Danish war convenes in London | 04/25/1864 |
| Crime/Disasters | In Philadelphia, a massive boiler explosion on Cherry Street kills seven | 04/25/1864 |
| Religion/Philosophy | Passover |
04/21/1864 to 04/28/1864 |
| Legal/Political | The first session of the 38th Congress is sitting in Washington DC from early January to early July, 1864 |
01/07/1864 to 07/03/1864 |
| US/the World | The London Peace Conference aimed at ending the German-Danish war breaks up in failure | 04/25/1864 |