Public holidays
1666, Hungary
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1666 | New Year's Day |
| 2 | Monday, 15 March 1666 | National Day |
| 3 | Sunday, 18 April 1666 | Easter Sunday |
| 4 | Monday, 19 April 1666 | Easter Monday |
| 5 | Saturday, 1 May 1666 | Labour Day |
| 6 | Sunday, 6 June 1666 | Pentecost Sunday |
| 7 | Monday, 7 June 1666 | Pentecost Monday |
| 8 | Friday, 20 August 1666 | State Foundation Day |
| 9 | Saturday, 23 October 1666 | National Day |
| 10 | Monday, 1 November 1666 | All Saints' Day |
| 11 | Saturday, 25 December 1666 | Christmas Day |
| 12 | Sunday, 26 December 1666 | Second Day of Christmas |