Define a period

...

How many working days in year 2023?

Here is the detail of the calculation:

Because 2023 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 13 public holidays that do not fall during a weekend and we obtain 247 working days in 2023.

Here is the list of these 13 public holidays:

1. Seollal / Korean New Year Holiday : Monday, 23 January, 2023
2. Seollal / Korean New Year Holiday : Tuesday, 24 January, 2023
3. 삼일절 : Wednesday, 1 March, 2023
4. 어린이날 : Friday, 5 May, 2023
5. 석가탄신일 : Monday, 29 May, 2023
6. 현충일 : Tuesday, 6 June, 2023
7. 광복절 : Tuesday, 15 August, 2023
8. 추석 : Thursday, 28 September, 2023
9. 추석 : Friday, 29 September, 2023
10. 정부 지정 추가 휴일 : Monday, 2 October, 2023
11. 개천절 : Tuesday, 3 October, 2023
12. 한글날 : Monday, 9 October, 2023
13. 성탄절 : Monday, 25 December, 2023

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

1. 신정 : Sunday, 1 January, 2023
2. Seollal / Korean New Year Holiday : Saturday, 21 January, 2023
3. Seollal / Korean New Year Holiday : Sunday, 22 January, 2023
4. 추석 : Saturday, 30 September, 2023