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How many working days in year 2004?
Here is the detail of the calculation:
Because 2004 is a leap year, it has 366 days.
Let's remove 52 saturdays and 52 sundays. It remains 262 days.
Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 251 working days in 2004.
 Here is the list of these 11 public holidays: 
 
 1. Año Nuevo : Thursday, 1 January, 2004 
2. Día de los Santos Reyes : Tuesday, 6 January, 2004 
3. Día de Nuestra Señora de la Altagracia : Wednesday, 21 January, 2004 
4. Día de Juan Pablo Duarte : Monday, 26 January, 2004 
5. Día de la Independencia Nacional : Friday, 27 February, 2004 
6. Viernes Santo : Friday, 9 April, 2004 
7. Día del Trabajo : Monday, 3 May, 2004 
8. Corpus Christi : Thursday, 10 June, 2004 
9. Día de la Restauración de la República : Monday, 16 August, 2004 
10. Nuestra Señora de las Mercedes : Friday, 24 September, 2004 
11. Día de la Constitución : Monday, 8 November, 2004 
And here is the public holiday falling on a weekend:
1. Navidad : Saturday, 25 December, 2004