Define a period

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How many working days in year 1986?

Here is the detail of the calculation:

Because 1986 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 1986.

Here is the list of these 10 public holidays:

1. Uusaasta : Wednesday, 1 January, 1986
2. Iseseisvuspäev : Monday, 24 February, 1986
3. Suur Reede : Friday, 28 March, 1986
4. Kevadpüha : Thursday, 1 May, 1986
5. Võidupüha : Monday, 23 June, 1986
6. Jaanipäev : Tuesday, 24 June, 1986
7. Taasiseseisvumispäev : Wednesday, 20 August, 1986
8. Jõululaupäev : Wednesday, 24 December, 1986
9. Esimene jõulupüha : Thursday, 25 December, 1986
10. Teine jõulupüha : Friday, 26 December, 1986

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

1. Ülestõusmispühad : Sunday, 30 March, 1986
2. Nelipühad : Sunday, 18 May, 1986