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 10 public holidays that do not fall during a weekend and we obtain 250 working days in 2000.

Here is the list of these 10 public holidays:

1. Нова година : Monday, 3 January, 2000
2. Национален ден : Friday, 3 March, 2000
3. Православни Велики петък : Friday, 28 April, 2000
4. Православни Велики понеделник : Monday, 1 May, 2000
5. Гергьовден (наблюдаван) : Monday, 8 May, 2000
6. Ден на културата и славянската писменост : Wednesday, 24 May, 2000
7. Ден на съединението : Wednesday, 6 September, 2000
8. Ден на независимостта : Friday, 22 September, 2000
9. Коледа : Monday, 25 December, 2000
10. Втори ден на Коледа : Tuesday, 26 December, 2000

And here are the 5 public holidays falling on a weekend:

1. Нова година : Saturday, 1 January, 2000
2. Православна Велика събота : Saturday, 29 April, 2000
3. Православен Великден : Sunday, 30 April, 2000
4. Гергьовден : Saturday, 6 May, 2000
5. Бъдни вечер : Sunday, 24 December, 2000