Public holidays
1644, España, Cantabria
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1644 | Año Nuevo |
| 2 | Wednesday, 6 January 1644 | Epifanía del Señor |
| 3 | Thursday, 24 March 1644 | Jueves santo |
| 4 | Friday, 25 March 1644 | Viernes Santo |
| 5 | Monday, 28 March 1644 | Lunes de Pascua |
| 6 | Sunday, 1 May 1644 | Fiesta del Trabajo |
| 7 | Monday, 25 July 1644 | Santiago Apóstol |
| 8 | Thursday, 28 July 1644 | Día de las Instituciones de Cantabria |
| 9 | Monday, 15 August 1644 | Asuncíon de la Virgen |
| 10 | Thursday, 15 September 1644 | La Bien Aparecida |
| 11 | Wednesday, 12 October 1644 | Fiesta nacional de España |
| 12 | Tuesday, 1 November 1644 | Todos los Santos |
| 13 | Tuesday, 6 December 1644 | Día de la Constitución Española |
| 14 | Thursday, 8 December 1644 | Immaculada Concepcíon |
| 15 | Sunday, 25 December 1644 | Día de Navidad |
| 16 | Monday, 26 December 1644 | Día de Navidad |