Public holidays
1666, Serbia
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1666 | New Year's Day |
| 2 | Saturday, 2 January 1666 | New Year's Holiday |
| 3 | Thursday, 7 January 1666 | Orthodox Christmas Day |
| 4 | Monday, 15 February 1666 | National Day |
| 5 | Tuesday, 16 February 1666 | National Day Holiday |
| 6 | Saturday, 1 May 1666 | May Day |
| 7 | Sunday, 2 May 1666 | May Day Holiday |
| 8 | Thursday, 11 November 1666 | Armistice Day |