Define a period

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How many working days in year 2033?

Here is the detail of the calculation:

Because 2033 is not a leap year, it has 365 days.

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

Now, let's remove 15 public holidays that do not fall during a weekend and we obtain 245 working days in 2033.

Here is the list of these 15 public holidays:

1. New Year's Day (observance) : Monday, 3 January, 2033
2. Coming of Age Day : Monday, 10 January, 2033
3. Foundation Day : Friday, 11 February, 2033
4. Emperor's Birthday : Wednesday, 23 February, 2033
5. Shōwa Day : Friday, 29 April, 2033
6. Constitution Memorial Day : Tuesday, 3 May, 2033
7. Greenery Day : Wednesday, 4 May, 2033
8. Children's Day : Thursday, 5 May, 2033
9. Marine Day : Monday, 18 July, 2033
10. Mountain Day : Thursday, 11 August, 2033
11. Respect-for-Aged Day : Monday, 19 September, 2033
12. Autumnal Equinox Day : Friday, 23 September, 2033
13. Health and Sports Day : Monday, 10 October, 2033
14. Culture Day : Thursday, 3 November, 2033
15. Labor Thanksgiving Day : Wednesday, 23 November, 2033

And here are the 2 public holidays falling on a weekend:

1. New Year's Day : Saturday, 1 January, 2033
2. Vernal Equinox Day : Sunday, 20 March, 2033