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How many working days in year 1974?

Here is the detail of the calculation:

Because 1974 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 15 public holidays that do not fall during a weekend and we obtain 246 working days in 1974.

Here is the list of these 15 public holidays:

1. New Year's Day : вторник, 1 январь, 1974
2. Seollal / Korean New Year Holiday : вторник, 22 январь, 1974
3. Seollal / Korean New Year Holiday : среда, 23 январь, 1974
4. Seollal / Korean New Year Holiday : четверг, 24 январь, 1974
5. Independence Movement Day : пятница, 1 март, 1974
6. Buddha's Birthday : понедельник, 29 апрель, 1974
7. Children's Day : понедельник, 6 май, 1974
8. Buddha's Birthday : среда, 29 май, 1974
9. Memorial Day : четверг, 6 июнь, 1974
10. Liberation Day : четверг, 15 август, 1974
11. Chuseok / Midautumn Festival : понедельник, 30 сентябрь, 1974
12. Chuseok / Midautumn Festival : вторник, 1 октябрь, 1974
13. National Foundation Day : четверг, 3 октябрь, 1974
14. Hangeul Day : среда, 9 октябрь, 1974
15. Christmas Day : среда, 25 декабрь, 1974

And here are the 2 public holidays falling on a weekend:

1. Children's Day : воскресенье, 5 май, 1974
2. Chuseok / Midautumn Festival : воскресенье, 29 сентябрь, 1974