Define a period

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How many working days in year 1982?

Here is the detail of the calculation:

Because 1982 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 5 public holidays that do not fall during a weekend and we obtain 255 working days in 1982.

Here is the list of these 5 public holidays:

1. Pesach : Thursday, 8 April, 1982
2. Shvi'i shel Pesach : Wednesday, 14 April, 1982
3. Yom Ha-Atzmaut : Wednesday, 28 April, 1982
4. Rosh Hashanah : Sunday, 19 September, 1982
5. Yom Kippur : Monday, 27 September, 1982

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

1. Shavuot : Friday, 28 May, 1982
2. Rosh Hashanah : Saturday, 18 September, 1982
3. Sukkot : Saturday, 2 October, 1982
4. Shemini Atzeret / Simchat Torah : Saturday, 9 October, 1982