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How many working days in year 2120?
Here is the detail of the calculation:
Because 2120 is a leap year, it has 366 days.
Let's remove 52 saturdays and 52 sundays. It remains 262 days.
Now, let's remove 12 public holidays that do not fall during a weekend and we obtain 250 working days in 2120.
 Here is the list of these 12 public holidays: 
 
 1. Neijoerschdag : Monday, 1 January, 2120 
2. Karfreideg : Friday, 12 April, 2120 
3. Ouschterméindeg : Monday, 15 April, 2120 
4. Dag vun der Aarbecht : Wednesday, 1 May, 2120 
5. Europadag : Thursday, 9 May, 2120 
6. Christi Himmelfaart : Thursday, 23 May, 2120 
7. Péngschtméindeg : Monday, 3 June, 2120 
8. Léiffrawëschdag : Thursday, 15 August, 2120 
9. Allerhellegen : Friday, 1 November, 2120 
10. Hellegowend : Tuesday, 24 December, 2120 
11. Chrëschtdag : Wednesday, 25 December, 2120 
12. Stiefesdag : Thursday, 26 December, 2120 
And here is the public holiday falling on a weekend:
1. Nationalfeierdag : Sunday, 23 June, 2120