Define a period

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How many working days in year 2020?

Here is the detail of the calculation:

Because 2020 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 255 working days in 2020.

Here is the list of these 7 public holidays:

1. Новы год : Wednesday, 1 January, 2020
2. Новы год : Thursday, 2 January, 2020
3. Каляды праваслаўныя : Tuesday, 7 January, 2020
4. Радунiца : Tuesday, 28 April, 2020
5. Дзень працы : Friday, 1 May, 2020
6. Дзень Незалежнасцi : Friday, 3 July, 2020
7. Каляды каталiцкiя : Friday, 25 December, 2020

And here are the 3 public holidays falling on a weekend:

1. Мiжнародны жаночы дзень : Sunday, 8 March, 2020
2. Дзень Перамогi : Saturday, 9 May, 2020
3. Дзень Кастрычніцкай рэвалюцыі : Saturday, 7 November, 2020