Define a period

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How many working days in year 2001?

Here is the detail of the calculation:

Because 2001 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 9 public holidays that do not fall during a weekend and we obtain 252 working days in 2001.

Here is the list of these 9 public holidays:

1. Новы год : Monday, 1 January, 2001
2. Новы год : Tuesday, 2 January, 2001
3. Мiжнародны жаночы дзень : Thursday, 8 March, 2001
4. Радунiца : Tuesday, 24 April, 2001
5. Дзень працы : Tuesday, 1 May, 2001
6. Дзень Перамогi : Wednesday, 9 May, 2001
7. Дзень Незалежнасцi : Tuesday, 3 July, 2001
8. Дзень Кастрычніцкай рэвалюцыі : Wednesday, 7 November, 2001
9. Каляды каталiцкiя : Tuesday, 25 December, 2001

And here is the public holiday falling on a weekend:

1. Каляды праваслаўныя : Sunday, 7 January, 2001