Define a period

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How many working days in year 1984?

Here is the detail of the calculation:

Because 1984 is a leap year, it has 366 days.

Let's remove 52 saturdays and 53 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 1984.

Here is the list of these 13 public holidays:

1. Seollal / Korean New Year Holiday : Wednesday, 1 February, 1984
2. Seollal / Korean New Year Holiday : Thursday, 2 February, 1984
3. Seollal / Korean New Year Holiday : Friday, 3 February, 1984
4. Independence Movement Day : Thursday, 1 March, 1984
5. Children's Day : Monday, 7 May, 1984
6. Buddha's Birthday : Tuesday, 8 May, 1984
7. Memorial Day : Wednesday, 6 June, 1984
8. Liberation Day : Wednesday, 15 August, 1984
9. Chuseok / Midautumn Festival : Monday, 10 September, 1984
10. Chuseok / Midautumn Festival : Tuesday, 11 September, 1984
11. National Foundation Day : Wednesday, 3 October, 1984
12. Hangeul Day : Tuesday, 9 October, 1984
13. Christmas Day : Tuesday, 25 December, 1984

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

1. New Year's Day : Sunday, 1 January, 1984
2. Children's Day : Saturday, 5 May, 1984
3. Chuseok / Midautumn Festival : Sunday, 9 September, 1984