Define a period

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How many working days in year 1955?

Here is the detail of the calculation:

Because 1955 is not a leap year, it has 365 days.

Let's remove 53 saturdays and 52 sundays. It remains 260 days.

Now, let's remove 12 public holidays that do not fall during a weekend and we obtain 248 working days in 1955.

Here is the list of these 12 public holidays:

1. Нова година : Monday, 3 January, 1955
2. Национален ден : Thursday, 3 March, 1955
3. Православни Велики петък : Friday, 15 April, 1955
4. Православни Велики понеделник : Monday, 18 April, 1955
5. Ден на труда (наблюдаван) : Monday, 2 May, 1955
6. Гергьовден : Friday, 6 May, 1955
7. Ден на културата и славянската писменост : Tuesday, 24 May, 1955
8. Ден на съединението : Tuesday, 6 September, 1955
9. Ден на независимостта : Thursday, 22 September, 1955
10. Втори ден на Коледа : Monday, 26 December, 1955
11. Коледа (наблюдаван) : Tuesday, 27 December, 1955
12. Коледа (наблюдаван) : Wednesday, 28 December, 1955

And here are the 6 public holidays falling on a weekend:

1. Нова година : Saturday, 1 January, 1955
2. Православна Велика събота : Saturday, 16 April, 1955
3. Православен Великден : Sunday, 17 April, 1955
4. Ден на труда : Sunday, 1 May, 1955
5. Бъдни вечер : Saturday, 24 December, 1955
6. Коледа : Sunday, 25 December, 1955