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How many working days in year 1967?

Here is the detail of the calculation:

Because 1967 is not a leap year, it has 365 days.

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

Now, let's remove 13 public holidays that do not fall during a weekend and we obtain 247 working days in 1967.

Here is the list of these 13 public holidays:

1. Seollal / Korean New Year Holiday : среда, 8 февраль, 1967
2. Seollal / Korean New Year Holiday : четверг, 9 февраль, 1967
3. Seollal / Korean New Year Holiday : пятница, 10 февраль, 1967
4. Independence Movement Day : среда, 1 март, 1967
5. Children's Day : пятница, 5 май, 1967
6. Buddha's Birthday : вторник, 16 май, 1967
7. Memorial Day : вторник, 6 июнь, 1967
8. Liberation Day : вторник, 15 август, 1967
9. Chuseok / Midautumn Festival : понедельник, 18 сентябрь, 1967
10. Chuseok / Midautumn Festival : вторник, 19 сентябрь, 1967
11. National Foundation Day : вторник, 3 октябрь, 1967
12. Hangeul Day : понедельник, 9 октябрь, 1967
13. Christmas Day : понедельник, 25 декабрь, 1967

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

1. New Year's Day : воскресенье, 1 январь, 1967
2. Chuseok / Midautumn Festival : воскресенье, 17 сентябрь, 1967