Define a period

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How many working days in year 2056?

Here is the detail of the calculation:

Because 2056 is a leap year, it has 366 days.

Let's remove 53 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 12 public holidays that do not fall during a weekend and we obtain 248 working days in 2056.

Here is the list of these 12 public holidays:

1. Seollal / Korean New Year Holiday : Monday, 14 February, 2056
2. Seollal / Korean New Year Holiday : Tuesday, 15 February, 2056
3. Seollal / Korean New Year Holiday : Wednesday, 16 February, 2056
4. 삼일절 : Wednesday, 1 March, 2056
5. 어린이날 : Friday, 5 May, 2056
6. 석가탄신일 : Monday, 22 May, 2056
7. 현충일 : Tuesday, 6 June, 2056
8. 광복절 : Tuesday, 15 August, 2056
9. 추석 : Monday, 25 September, 2056
10. 개천절 : Tuesday, 3 October, 2056
11. 한글날 : Monday, 9 October, 2056
12. 성탄절 : Monday, 25 December, 2056

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

1. 신정 : Saturday, 1 January, 2056
2. 추석 : Saturday, 23 September, 2056
3. 추석 : Sunday, 24 September, 2056