Public holidays
1666, Suisse, Aargau (Rheinfelden)
| # | 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 | Thursday, 27 May 1666 | Ascension Day |
| 5 | Monday, 7 June 1666 | Whit Monday |
| 6 | Sunday, 1 August 1666 | Swiss National Day |
| 7 | Monday, 1 November 1666 | All Saints' Day |
| 8 | Saturday, 25 December 1666 | Christmas Day |
| 9 | Sunday, 26 December 1666 | Saint Stephen's Day |