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How many working days in year 1902?
Here is the detail of the calculation:
Because 1902 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 11 public holidays that do not fall during a weekend and we obtain 250 working days in 1902.
 Here is the list of these 11 public holidays: 
 
 1. Año Nuevo : Wednesday, 1 January, 1902 
2. Lunes de Carnaval : Monday, 10 February, 1902 
3. Martes de Carnaval : Tuesday, 11 February, 1902 
4. Viernes Santo : Friday, 28 March, 1902 
5. Día del Trabajo : Friday, 2 May, 1902 
6. Batalla de Pichincha : Friday, 23 May, 1902 
7. Primer Grito de la Independencia : Monday, 11 August, 1902 
8. Independencia de Guayaquil : Friday, 10 October, 1902 
9. Independencia de Cuenca : Monday, 3 November, 1902 
10. Día de los Difuntos : Tuesday, 4 November, 1902 
11. Navidad : Thursday, 25 December, 1902