Define a period

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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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1985.

Here is the list of these 10 public holidays:

1. Første nyttårsdag : Tuesday, 1 January, 1985
2. Skjærtorsdag : Thursday, 4 April, 1985
3. Langfredag : Friday, 5 April, 1985
4. Andre påskedag : Monday, 8 April, 1985
5. Første mai : Wednesday, 1 May, 1985
6. Kristi Himmelfartsdag : Thursday, 16 May, 1985
7. Grunnlovsdagen : Friday, 17 May, 1985
8. Andre pinsedag : Monday, 27 May, 1985
9. Første Juledag : Wednesday, 25 December, 1985
10. Andre Juledag : Thursday, 26 December, 1985

And here are the 2 public holidays falling on a weekend:

1. Første påskedag : Sunday, 7 April, 1985
2. Første pinsedag : Sunday, 26 May, 1985