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How many working days in year 1949?
Here is the detail of the calculation:
Because 1949 is not a leap year, it has 365 days.
Let's remove 53 saturdays and 52 sundays. It remains 260 days.
Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 249 working days in 1949.
 Here is the list of these 11 public holidays: 
 
 1. Lunes de Carnaval : Monday, 28 February, 1949 
2. Martes de Carnaval : Tuesday, 1 March, 1949 
3. Día Nacional de la Memoria por la Verdad y la Justicia : Thursday, 24 March, 1949 
4. Jueves Santo : Thursday, 14 April, 1949 
5. Viernes Santo : Friday, 15 April, 1949 
6. Día de la Revolución de Mayo : Wednesday, 25 May, 1949 
7. Conmemoración de la muerte del General Manuel Belgrano : Monday, 20 June, 1949 
8. Día del Paso a la Inmortalidad del General José de San Martín : Monday, 15 August, 1949 
9. Día del Respeto a la Diversidad Cultural : Monday, 10 October, 1949 
10. Día de la Soberanía Nacional : Monday, 21 November, 1949 
11. Día de la Inmaculada Concepción : Thursday, 8 December, 1949 
And here are the 5 public holidays falling on a weekend:
1. Año Nuevo : Saturday, 1 January, 1949 
2. Día del Veterano y de los Caídos en la Guerra de Malvinas : Saturday, 2 April, 1949 
3. Día Internacional de los Trabajadores : Sunday, 1 May, 1949 
4. Día de la Independencia : Saturday, 9 July, 1949 
5. Navidad : Sunday, 25 December, 1949