Define a period

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How many working days in year 1985?

Here is the detail of the calculation:

Because 1985 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 12 public holidays that do not fall during a weekend and we obtain 249 working days in 1985.

Here is the list of these 12 public holidays:

1. Нова година : Tuesday, 1 January, 1985
2. Национален ден (наблюдаван) : Monday, 4 March, 1985
3. Православни Велики петък : Friday, 12 April, 1985
4. Православни Велики понеделник : Monday, 15 April, 1985
5. Ден на труда : Wednesday, 1 May, 1985
6. Гергьовден : Monday, 6 May, 1985
7. Ден на културата и славянската писменост : Friday, 24 May, 1985
8. Ден на съединението : Friday, 6 September, 1985
9. Ден на независимостта (наблюдаван) : Monday, 23 September, 1985
10. Бъдни вечер : Tuesday, 24 December, 1985
11. Коледа : Wednesday, 25 December, 1985
12. Втори ден на Коледа : Thursday, 26 December, 1985

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

1. Национален ден : Sunday, 3 March, 1985
2. Православна Велика събота : Saturday, 13 April, 1985
3. Православен Великден : Sunday, 14 April, 1985
4. Ден на независимостта : Sunday, 22 September, 1985