Define a period

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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 : Monday, 1 January, 1973
2. Seollal / Korean New Year Holiday : Friday, 2 February, 1973
3. Independence Movement Day : Thursday, 1 March, 1973
4. Children's Day : Monday, 7 May, 1973
5. Buddha's Birthday : Thursday, 10 May, 1973
6. Memorial Day : Wednesday, 6 June, 1973
7. Liberation Day : Wednesday, 15 August, 1973
8. Chuseok / Midautumn Festival : Monday, 10 September, 1973
9. Chuseok / Midautumn Festival : Tuesday, 11 September, 1973
10. Chuseok / Midautumn Festival : Wednesday, 12 September, 1973
11. National Foundation Day : Wednesday, 3 October, 1973
12. Hangeul Day : Tuesday, 9 October, 1973
13. Christmas Day : Tuesday, 25 December, 1973

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

1. Seollal / Korean New Year Holiday : Saturday, 3 February, 1973
2. Seollal / Korean New Year Holiday : Sunday, 4 February, 1973
3. Children's Day : Saturday, 5 May, 1973