Birthdays
John Armor Bingham
Turns 51 on this date
John Charles Frémont
Turns 53 on this date
Anson Herrick
Turns 54 on this date
James Henry Morgan
Turns 9 on this date
Henry D. O'Brien
Turns 24 on this date
Events
| Crime/Disasters | In upstate New York, the Niagara River is reported as frozen over for three miles above Niagara Falls | 01/21/1866 |
| Crime/Disasters | Months of sometimes violent volcanic activity are striking the Greek Island of Santorini |
01/19/1866 to 02/20/1866 |
| Legal/Political | The first session of the 39th Congress is sitting in Washington DC from early January to late July, 1866 |
01/07/1866 to 07/27/1866 |