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How many working days in year 1963?

Here is the detail of the calculation:

Because 1963 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 14 public holidays that do not fall during a weekend and we obtain 247 working days in 1963.

Here is the list of these 14 public holidays:

1. New Year's Day : вторник, 1 январь, 1963
2. Seollal / Korean New Year Holiday : четверг, 24 январь, 1963
3. Seollal / Korean New Year Holiday : пятница, 25 январь, 1963
4. Independence Movement Day : пятница, 1 март, 1963
5. Buddha's Birthday : среда, 1 май, 1963
6. Children's Day : понедельник, 6 май, 1963
7. Buddha's Birthday : четверг, 30 май, 1963
8. Memorial Day : четверг, 6 июнь, 1963
9. Liberation Day : четверг, 15 август, 1963
10. Chuseok / Midautumn Festival : вторник, 1 октябрь, 1963
11. Chuseok / Midautumn Festival : среда, 2 октябрь, 1963
12. Chuseok / Midautumn Festival : четверг, 3 октябрь, 1963
13. Hangeul Day : среда, 9 октябрь, 1963
14. Christmas Day : среда, 25 декабрь, 1963

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

1. Seollal / Korean New Year Holiday : суббота, 26 январь, 1963
2. Children's Day : воскресенье, 5 май, 1963