Define a period

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How many working days in year 2065?

Here is the detail of the calculation:

Because 2065 is not a leap year, it has 365 days.

Let's remove 52 saturdays and 52 sundays. It remains 261 days.

Now, let's remove 12 public holidays that do not fall during a weekend and we obtain 249 working days in 2065.

Here is the list of these 12 public holidays:

1. 신정 : Thursday, 1 January, 2065
2. Seollal / Korean New Year Holiday : Wednesday, 4 February, 2065
3. Seollal / Korean New Year Holiday : Thursday, 5 February, 2065
4. Seollal / Korean New Year Holiday : Friday, 6 February, 2065
5. 삼일절 : Monday, 2 March, 2065
6. 어린이날 : Tuesday, 5 May, 2065
7. 석가탄신일 : Tuesday, 12 May, 2065
8. 추석 : Monday, 14 September, 2065
9. 추석 : Tuesday, 15 September, 2065
10. 추석 : Wednesday, 16 September, 2065
11. 한글날 : Friday, 9 October, 2065
12. 성탄절 : Friday, 25 December, 2065

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

1. 삼일절 : Sunday, 1 March, 2065
2. 현충일 : Saturday, 6 June, 2065
3. 광복절 : Saturday, 15 August, 2065
4. 개천절 : Saturday, 3 October, 2065