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How many working days in year 1985?
Here is the detail of the calculation:
Because 1985 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 1985.
 Here is the list of these 9 public holidays: 
 
 1. Nytårsdag : Tuesday, 1 January, 1985 
2. Skærtorsdag : Thursday, 4 April, 1985 
3. Langfredag : Friday, 5 April, 1985 
4. 2. påskedag : Monday, 8 April, 1985 
5. Store Bededag : Friday, 3 May, 1985 
6. Kristi Himmelfartsdag : Thursday, 16 May, 1985 
7. 2. pinsedag : Monday, 27 May, 1985 
8. Juledag : Wednesday, 25 December, 1985 
9. 2. juledag : Thursday, 26 December, 1985 
And here are the 2 public holidays falling on a weekend:
1. Påskedag : Sunday, 7 April, 1985 
2. Pinsedag : Sunday, 26 May, 1985