Public holidays
1521, Poland, National public holidays
| # | Date | Public holiday |
|---|---|---|
| 1 | Saturday, 1 January 1521 | New Year's Day |
| 2 | Thursday, 6 January 1521 | Epiphany |
| 3 | Sunday, 3 April 1521 | Easter Sunday |
| 4 | Monday, 4 April 1521 | Easter Monday |
| 5 | Sunday, 1 May 1521 | Labour Day |
| 6 | Tuesday, 3 May 1521 | Constitution Day |
| 7 | Sunday, 22 May 1521 | Pentecost Sunday |
| 8 | Thursday, 2 June 1521 | Corpus Christi |
| 9 | Monday, 15 August 1521 | Assumption of Mary |
| 10 | Tuesday, 1 November 1521 | All Saints' Day |
| 11 | Friday, 11 November 1521 | Independence Day |
| 12 | Sunday, 25 December 1521 | Christmas Day |
| 13 | Monday, 26 December 1521 | Boxing Day/Christmas Eve |