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How many working days in year 2119?
Here is the detail of the calculation:
Because 2119 is not a leap year, it has 365 days.
Let's remove 52 saturdays and 53 sundays. It remains 260 days.
Now, let's remove 9 public holidays that do not fall during a weekend and we obtain 251 working days in 2119.
 Here is the list of these 9 public holidays: 
 
 1. Paasmaandag : Monday, 27 March, 2119 
2. Dag van de Arbeid : Monday, 1 May, 2119 
3. Hemelvaartsdag : Thursday, 4 May, 2119 
4. Pinkstermaandag : Monday, 15 May, 2119 
5. Nationale Feestdag : Friday, 21 July, 2119 
6. Onze-Lieve-Vrouw Hemelvaart : Tuesday, 15 August, 2119 
7. Feest van de Franse Gemeenschap : Wednesday, 27 September, 2119 
8. Allerheiligen : Wednesday, 1 November, 2119 
9. Kerstmis : Monday, 25 December, 2119 
And here are the 2 public holidays falling on a weekend:
1. Nieuwjaarsdag : Sunday, 1 January, 2119 
2. Wapenstilstand : Saturday, 11 November, 2119