1866 Holidays and Events in Poland
| Additional Information | Date | Name |
|---|---|---|
| 1/1/1866, Mon | New Year's Day | |
| 3/25/1866, Sun | Palm Sunday | |
| 4/1/1866, Sun | Easter | |
| 4/2/1866, Mon | Easter Monday | |
| 5/1/1866, Tue | May Day / Labor Day | |
| 5/3/1866, Thu | Constitution Day | |
| 5/31/1866, Thu | Corpus Christi | |
| 5/31/1866, Thu | Whit Sunday | |
| 8/15/1866, Wed | Assumption / Polish Army Day | |
| 11/1/1866, Thu | All Saints' Day | |
| 11/11/1866, Sun | National Independence Day | |
| 12/24/1866, Mon | Christmas Eve | |
| 12/25/1866, Tue | Christmas Day | |
| 12/26/1866, Wed | Christmas - 2nd Day | |
| 12/31/1866, Mon | New Year's Eve |