Define a period

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How many working days in year 1995?

Here is the detail of the calculation:

Because 1995 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 1995.

Here is the list of these 11 public holidays:

1. New Year's Day (observance) : Monday, 2 January, 1995
2. Coming of Age Day : Monday, 9 January, 1995
3. Vernal Equinox Day : Monday, 20 March, 1995
4. Constitution Memorial Day : Wednesday, 3 May, 1995
5. Greenery Day : Thursday, 4 May, 1995
6. Children's Day : Friday, 5 May, 1995
7. Marine Day : Monday, 17 July, 1995
8. Respect-for-Aged Day : Monday, 18 September, 1995
9. Health and Sports Day : Monday, 9 October, 1995
10. Culture Day : Friday, 3 November, 1995
11. Labor Thanksgiving Day : Thursday, 23 November, 1995

And here are the 5 public holidays falling on a weekend:

1. New Year's Day : Sunday, 1 January, 1995
2. Foundation Day : Saturday, 11 February, 1995
3. Shōwa Day : Saturday, 29 April, 1995
4. Autumnal Equinox Day : Saturday, 23 September, 1995
5. Emperor's Birthday : Saturday, 23 December, 1995