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 8 public holidays that do not fall during a weekend and we obtain 253 working days in 1985.

Here is the list of these 8 public holidays:

1. Uusaasta : Tuesday, 1 January, 1985
2. Suur Reede : Friday, 5 April, 1985
3. Kevadpüha : Wednesday, 1 May, 1985
4. Jaanipäev : Monday, 24 June, 1985
5. Taasiseseisvumispäev : Tuesday, 20 August, 1985
6. Jõululaupäev : Tuesday, 24 December, 1985
7. Esimene jõulupüha : Wednesday, 25 December, 1985
8. Teine jõulupüha : Thursday, 26 December, 1985

And here are the 4 public holidays falling on a weekend:

1. Iseseisvuspäev : Sunday, 24 February, 1985
2. Ülestõusmispühad : Sunday, 7 April, 1985
3. Nelipühad : Sunday, 26 May, 1985
4. Võidupüha : Sunday, 23 June, 1985