Public holidays
1866, Estonia
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, 1 January 1866 | New Year's Day |
| 2 | Saturday, 24 February 1866 | Independence Day |
| 3 | Friday, 30 March 1866 | Good Friday |
| 4 | Sunday, 1 April 1866 | Easter |
| 5 | Tuesday, 1 May 1866 | Spring Day |
| 6 | Sunday, 20 May 1866 | Pentecost |
| 7 | Saturday, 23 June 1866 | Victory Day |
| 8 | Sunday, 24 June 1866 | Midsummer Day |
| 9 | Monday, 20 August 1866 | Independence Restoration Day |
| 10 | Monday, 24 December 1866 | Christmas Eve |
| 11 | Tuesday, 25 December 1866 | Christmas Day |
| 12 | Wednesday, 26 December 1866 | Second Day of Christmas |