Public holidays
1400, Poland, National public holidays
| # | Date | Public holiday |
|---|---|---|
| 1 | Wednesday, 1 January 1400 | New Year's Day |
| 2 | Monday, 6 January 1400 | Epiphany |
| 3 | Sunday, 20 April 1400 | Easter Sunday |
| 4 | Monday, 21 April 1400 | Easter Monday |
| 5 | Thursday, 1 May 1400 | Labour Day |
| 6 | Saturday, 3 May 1400 | Constitution Day |
| 7 | Sunday, 8 June 1400 | Pentecost Sunday |
| 8 | Thursday, 19 June 1400 | Corpus Christi |
| 9 | Friday, 15 August 1400 | Assumption of Mary |
| 10 | Saturday, 1 November 1400 | All Saints' Day |
| 11 | Tuesday, 11 November 1400 | Independence Day |
| 12 | Thursday, 25 December 1400 | Christmas Day |
| 13 | Friday, 26 December 1400 | Boxing Day |