Public holidays
1666, Slovenia
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1666 | New Year's Day |
| 2 | Saturday, 2 January 1666 | New Year Holiday |
| 3 | Monday, 8 February 1666 | Preseren's Day |
| 4 | Sunday, 18 April 1666 | Easter |
| 5 | Monday, 19 April 1666 | Easter Monday |
| 6 | Tuesday, 27 April 1666 | Resistance Day |
| 7 | Saturday, 1 May 1666 | May Day |
| 8 | Sunday, 2 May 1666 | May Day Holiday |
| 9 | Sunday, 6 June 1666 | Whitsunday |
| 10 | Friday, 25 June 1666 | Statehood Day |
| 11 | Sunday, 15 August 1666 | Assumption Day |
| 12 | Sunday, 31 October 1666 | Reformation Day |
| 13 | Monday, 1 November 1666 | All Saints' Day |
| 14 | Saturday, 25 December 1666 | Christmas Day |
| 15 | Sunday, 26 December 1666 | Independence and Unity Day |