Define a period

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How many working days in year 2000?

Here is the detail of the calculation:

Because 2000 is a leap year, it has 366 days.

Let's remove 53 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 7 public holidays that do not fall during a weekend and we obtain 253 working days in 2000.

Here is the list of these 7 public holidays:

1. Каляды праваслаўныя : Friday, 7 January, 2000
2. Мiжнародны жаночы дзень : Wednesday, 8 March, 2000
3. Дзень працы : Monday, 1 May, 2000
4. Радунiца : Tuesday, 9 May, 2000
5. Дзень Незалежнасцi : Monday, 3 July, 2000
6. Дзень Кастрычніцкай рэвалюцыі : Tuesday, 7 November, 2000
7. Каляды каталiцкiя : Monday, 25 December, 2000

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

1. Новы год : Saturday, 1 January, 2000
2. Новы год : Sunday, 2 January, 2000