Define a period

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How many working days in year 1985?

Here is the detail of the calculation:

Because 1985 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 7 public holidays that do not fall during a weekend and we obtain 254 working days in 1985.

Here is the list of these 7 public holidays:

1. יום העצמאות : Thursday, 25 April, 1985
2. שבועות : Sunday, 26 May, 1985
3. ראש השנה : Monday, 16 September, 1985
4. ראש השנה : Tuesday, 17 September, 1985
5. יום כיפור : Wednesday, 25 September, 1985
6. סוכות : Monday, 30 September, 1985
7. שמחת תורה/שמיני עצרת : Monday, 7 October, 1985

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

1. פסח : Saturday, 6 April, 1985
2. שביעי של פסח : Friday, 12 April, 1985