Define a period

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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 : Tuesday, 1 January, 1974
2. Seollal / Korean New Year Holiday : Tuesday, 22 January, 1974
3. Seollal / Korean New Year Holiday : Wednesday, 23 January, 1974
4. Seollal / Korean New Year Holiday : Thursday, 24 January, 1974
5. Independence Movement Day : Friday, 1 March, 1974
6. Buddha's Birthday : Monday, 29 April, 1974
7. Children's Day : Monday, 6 May, 1974
8. Buddha's Birthday : Wednesday, 29 May, 1974
9. Memorial Day : Thursday, 6 June, 1974
10. Liberation Day : Thursday, 15 August, 1974
11. Chuseok / Midautumn Festival : Monday, 30 September, 1974
12. Chuseok / Midautumn Festival : Tuesday, 1 October, 1974
13. National Foundation Day : Thursday, 3 October, 1974
14. Hangeul Day : Wednesday, 9 October, 1974
15. Christmas Day : Wednesday, 25 December, 1974

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

1. Children's Day : Sunday, 5 May, 1974
2. Chuseok / Midautumn Festival : Sunday, 29 September, 1974