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How many working days in year 2027?
Here is the detail of the calculation:
Because 2027 is not a leap year, it has 365 days.
Let's remove 52 saturdays and 52 sundays. It remains 261 days.
Now, let's remove 9 public holidays that do not fall during a weekend and we obtain 252 working days in 2027.
 Here is the list of these 9 public holidays: 
 
 1. Año Nuevo : Friday, 1 January, 2027 
2. Viernes Santo : Friday, 26 March, 2027 
3. Día de las Glorias Navales : Friday, 21 May, 2027 
4. Día Nacional de los Pueblos Indígenas : Monday, 21 June, 2027 
5. San Pedro y San Pablo : Monday, 28 June, 2027 
6. Virgen del Carmen : Friday, 16 July, 2027 
7. Día del Descubrimiento de Dos Mundos : Monday, 11 October, 2027 
8. Día de Todos los Santos : Monday, 1 November, 2027 
9. Día de la Inmaculada Concepción : Wednesday, 8 December, 2027 
And here are the 7 public holidays falling on a weekend:
1. Sábado Santo : Saturday, 27 March, 2027 
2. Día Internacional de los Trabajadores : Saturday, 1 May, 2027 
3. Asunción de la Virgen : Sunday, 15 August, 2027 
4. Fiestas Patrias : Saturday, 18 September, 2027 
5. Día de las Glorias del Ejércitos : Sunday, 19 September, 2027 
6. Día Nacional de las Iglesias Evangélicas y Protestantes : Sunday, 31 October, 2027 
7. Navidad : Saturday, 25 December, 2027