Define a period

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How many working days in year 1996?

Here is the detail of the calculation:

Because 1996 is a leap year, it has 366 days.

Let's remove 52 saturdays and 52 sundays. It remains 262 days.

Now, let's remove 13 public holidays that do not fall during a weekend and we obtain 249 working days in 1996.

Here is the list of these 13 public holidays:

1. 신정 : Monday, 1 January, 1996
2. Seollal / Korean New Year Holiday : Monday, 19 February, 1996
3. Seollal / Korean New Year Holiday : Tuesday, 20 February, 1996
4. 삼일절 : Friday, 1 March, 1996
5. 어린이날 : Monday, 6 May, 1996
6. 석가탄신일 : Friday, 24 May, 1996
7. 현충일 : Thursday, 6 June, 1996
8. 광복절 : Thursday, 15 August, 1996
9. 추석 : Thursday, 26 September, 1996
10. 추석 : Friday, 27 September, 1996
11. 개천절 : Thursday, 3 October, 1996
12. 한글날 : Wednesday, 9 October, 1996
13. 성탄절 : Wednesday, 25 December, 1996

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

1. Seollal / Korean New Year Holiday : Sunday, 18 February, 1996
2. 어린이날 : Sunday, 5 May, 1996
3. 추석 : Saturday, 28 September, 1996