Public holidays
1678, Poland, National public holidays
| # | Date | Public holiday |
|---|---|---|
| 1 | Saturday, 1 January 1678 | New Year's Day |
| 2 | Thursday, 6 January 1678 | Epiphany |
| 3 | Sunday, 10 April 1678 | Easter Sunday |
| 4 | Monday, 11 April 1678 | Easter Monday |
| 5 | Sunday, 1 May 1678 | Labour Day |
| 6 | Tuesday, 3 May 1678 | Constitution Day |
| 7 | Sunday, 29 May 1678 | Pentecost Sunday |
| 8 | Thursday, 9 June 1678 | Corpus Christi |
| 9 | Monday, 15 August 1678 | Assumption of Mary |
| 10 | Tuesday, 1 November 1678 | All Saints' Day |
| 11 | Friday, 11 November 1678 | Independence Day |
| 12 | Sunday, 25 December 1678 | Christmas Day |
| 13 | Monday, 26 December 1678 | Boxing Day/Christmas Eve |