Días feriados
1644, United Kingdom, Northern Ireland
| # | Fecha | Día feriado |
|---|---|---|
| 1 | Viernes, 1 Enero 1644 | New Year's Day |
| 2 | Jueves, 17 Marzo 1644 | St. Patrick's Day |
| 3 | Viernes, 25 Marzo 1644 | Good Friday |
| 4 | Lunes, 28 Marzo 1644 | Easter Monday |
| 5 | Lunes, 2 Mayo 1644 | Early May Bank Holiday |
| 6 | Lunes, 30 Mayo 1644 | Spring Bank Holiday |
| 7 | Martes, 12 Julio 1644 | Orangemen's Day |
| 8 | Lunes, 29 Agosto 1644 | Late Summer Bank Holiday |
| 9 | Lunes, 26 Diciembre 1644 | Christmas Day (substitute day) |
| 10 | Martes, 27 Diciembre 1644 | Boxing Day (substitute day) |