Public holidays
1666, Luxembourg, Calendrier bancaire
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1666 | New Year's Day |
| 2 | Friday, 16 April 1666 | Good Friday |
| 3 | Monday, 19 April 1666 | Easter Monday |
| 4 | Saturday, 1 May 1666 | Labour Day |
| 5 | Thursday, 27 May 1666 | Ascension Day |
| 6 | Monday, 7 June 1666 | Whit Monday |
| 7 | Wednesday, 23 June 1666 | National Day |
| 8 | Sunday, 15 August 1666 | Assumption of Mary |
| 9 | Monday, 1 November 1666 | All Saints' Day |
| 10 | Friday, 24 December 1666 | Christmas Eve |
| 11 | Saturday, 25 December 1666 | Christmas Day |
| 12 | Sunday, 26 December 1666 | St. Stephen's Day |