Define a period

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How many working days in year 1945?

Here is the detail of the calculation:

Because 1945 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 1945.

Here is the list of these 14 public holidays:

1. New Year's Day : Monday, 1 January, 1945
2. Seollal / Korean New Year Holiday : Monday, 12 February, 1945
3. Seollal / Korean New Year Holiday : Tuesday, 13 February, 1945
4. Seollal / Korean New Year Holiday : Wednesday, 14 February, 1945
5. Independence Movement Day : Thursday, 1 March, 1945
6. Children's Day : Monday, 7 May, 1945
7. Memorial Day : Wednesday, 6 June, 1945
8. Liberation Day : Wednesday, 15 August, 1945
9. Chuseok / Midautumn Festival : Wednesday, 19 September, 1945
10. Chuseok / Midautumn Festival : Thursday, 20 September, 1945
11. Chuseok / Midautumn Festival : Friday, 21 September, 1945
12. National Foundation Day : Wednesday, 3 October, 1945
13. Hangeul Day : Tuesday, 9 October, 1945
14. Christmas Day : Tuesday, 25 December, 1945

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

1. Children's Day : Saturday, 5 May, 1945
2. Buddha's Birthday : Saturday, 19 May, 1945