Define a period

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How many working days in year 2002?

Here is the detail of the calculation:

Because 2002 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 11 public holidays that do not fall during a weekend and we obtain 250 working days in 2002.

Here is the list of these 11 public holidays:

1. Нова година : Tuesday, 1 January, 2002
2. Национален ден (наблюдаван) : Monday, 4 March, 2002
3. Ден на труда : Wednesday, 1 May, 2002
4. Православни Велики петък : Friday, 3 May, 2002
5. Православни Велики понеделник : Monday, 6 May, 2002
6. Ден на културата и славянската писменост : Friday, 24 May, 2002
7. Ден на съединението : Friday, 6 September, 2002
8. Ден на независимостта (наблюдаван) : Monday, 23 September, 2002
9. Бъдни вечер : Tuesday, 24 December, 2002
10. Коледа : Wednesday, 25 December, 2002
11. Втори ден на Коледа : Thursday, 26 December, 2002

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

1. Национален ден : Sunday, 3 March, 2002
2. Православна Велика събота : Saturday, 4 May, 2002
3. Православен Великден : Sunday, 5 May, 2002
4. Ден на независимостта : Sunday, 22 September, 2002