Public holidays
1866, United Kingdom, Northern Ireland
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, 1 January 1866 | New Year's Day |
| 2 | Monday, 19 March 1866 | St. Patrick's Day (substitute day) |
| 3 | Friday, 30 March 1866 | Good Friday |
| 4 | Monday, 2 April 1866 | Easter Monday |
| 5 | Monday, 28 May 1866 | Spring Bank Holiday |
| 6 | Thursday, 12 July 1866 | Orangemen's Day |
| 7 | Monday, 27 August 1866 | Late Summer Bank Holiday |
| 8 | Tuesday, 25 December 1866 | Christmas Day |
| 9 | Wednesday, 26 December 1866 | Boxing Day |