Public holidays
1640, Suisse, Basel-Stadt
| # | Date | Public holiday |
|---|---|---|
| 1 | Sunday, 1 January 1640 | New Year's Day |
| 2 | Friday, 6 April 1640 | Good Friday |
| 3 | Monday, 9 April 1640 | Easter Monday |
| 4 | Tuesday, 1 May 1640 | Labour Day |
| 5 | Thursday, 17 May 1640 | Ascension Day |
| 6 | Monday, 28 May 1640 | Whit Monday |
| 7 | Wednesday, 1 August 1640 | Swiss National Day |
| 8 | Tuesday, 25 December 1640 | Christmas Day |
| 9 | Wednesday, 26 December 1640 | Saint Stephen's Day |