Определить период

...

How many working days in year 1973?

Here is the detail of the calculation:

Because 1973 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 13 public holidays that do not fall during a weekend and we obtain 248 working days in 1973.

Here is the list of these 13 public holidays:

1. New Year's Day : понедельник, 1 январь, 1973
2. Seollal / Korean New Year Holiday : пятница, 2 февраль, 1973
3. Independence Movement Day : четверг, 1 март, 1973
4. Children's Day : понедельник, 7 май, 1973
5. Buddha's Birthday : четверг, 10 май, 1973
6. Memorial Day : среда, 6 июнь, 1973
7. Liberation Day : среда, 15 август, 1973
8. Chuseok / Midautumn Festival : понедельник, 10 сентябрь, 1973
9. Chuseok / Midautumn Festival : вторник, 11 сентябрь, 1973
10. Chuseok / Midautumn Festival : среда, 12 сентябрь, 1973
11. National Foundation Day : среда, 3 октябрь, 1973
12. Hangeul Day : вторник, 9 октябрь, 1973
13. Christmas Day : вторник, 25 декабрь, 1973

And here are the 3 public holidays falling on a weekend:

1. Seollal / Korean New Year Holiday : суббота, 3 февраль, 1973
2. Seollal / Korean New Year Holiday : воскресенье, 4 февраль, 1973
3. Children's Day : суббота, 5 май, 1973