Define a period

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How many working days in year 2073?

Here is the detail of the calculation:

Because 2073 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 53 sundays. It remains 260 days.

Now, let's remove 11 public holidays that do not fall during a weekend and we obtain 249 working days in 2073.

Here is the list of these 11 public holidays:

1. Seollal / Korean New Year Holiday : Monday, 6 February, 2073
2. Seollal / Korean New Year Holiday : Tuesday, 7 February, 2073
3. Seollal / Korean New Year Holiday : Wednesday, 8 February, 2073
4. 삼일절 : Wednesday, 1 March, 2073
5. 어린이날 : Friday, 5 May, 2073
6. 현충일 : Tuesday, 6 June, 2073
7. 광복절 : Tuesday, 15 August, 2073
8. 추석 : Friday, 15 September, 2073
9. 개천절 : Tuesday, 3 October, 2073
10. 한글날 : Monday, 9 October, 2073
11. 성탄절 : Monday, 25 December, 2073

And here are the 4 public holidays falling on a weekend:

1. 신정 : Sunday, 1 January, 2073
2. 석가탄신일 : Sunday, 14 May, 2073
3. 추석 : Saturday, 16 September, 2073
4. 추석 : Sunday, 17 September, 2073