Public holidays
1866, Russia
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, 1 January 1866 | New Year Holiday |
| 2 | Tuesday, 2 January 1866 | New Year Holiday |
| 3 | Wednesday, 3 January 1866 | New Year Holiday |
| 4 | Thursday, 4 January 1866 | New Year Holiday |
| 5 | Friday, 5 January 1866 | New Year Holiday |
| 6 | Saturday, 6 January 1866 | New Year Holiday |
| 7 | Sunday, 7 January 1866 | New Year Holiday |
| 8 | Monday, 8 January 1866 | New Year Holiday |
| 9 | Friday, 23 February 1866 | Defender of the Fatherland Day |
| 10 | Thursday, 8 March 1866 | Women's Day |
| 11 | Monday, 9 April 1866 | Orthodox Easter |
| 12 | Tuesday, 1 May 1866 | Spring and Labour Day |
| 13 | Wednesday, 9 May 1866 | Victory Day |
| 14 | Tuesday, 12 June 1866 | Russia Day |
| 15 | Sunday, 4 November 1866 | Unity Day |
| 16 | Monday, 5 November 1866 | Unity Day |