Define a period

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How many working days in year 1982?

Here is the detail of the calculation:

Because 1982 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 4 public holidays that do not fall during a weekend and we obtain 257 working days in 1982.

Here is the list of these 4 public holidays:

1. Новы год : Friday, 1 January, 1982
2. Каляды праваслаўныя : Thursday, 7 January, 1982
3. Мiжнародны жаночы дзень : Monday, 8 March, 1982
4. Радунiца : Tuesday, 27 April, 1982

And here are the 6 public holidays falling on a weekend:

1. Новы год : Saturday, 2 January, 1982
2. Дзень працы : Saturday, 1 May, 1982
3. Дзень Перамогi : Sunday, 9 May, 1982
4. Дзень Незалежнасцi : Saturday, 3 July, 1982
5. Дзень Кастрычніцкай рэвалюцыі : Sunday, 7 November, 1982
6. Каляды каталiцкiя : Saturday, 25 December, 1982