Define a period

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How many working days in year 2011?

Here is the detail of the calculation:

Because 2011 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 8 public holidays that do not fall during a weekend and we obtain 252 working days in 2011.

Here is the list of these 8 public holidays:

1. פורים : Sunday, 20 March, 2011
2. פסח : Tuesday, 19 April, 2011
3. שביעי של פסח : Monday, 25 April, 2011
4. יום העצמאות : Tuesday, 10 May, 2011
5. שבועות : Wednesday, 8 June, 2011
6. ראש השנה : Thursday, 29 September, 2011
7. סוכות : Thursday, 13 October, 2011
8. שמחת תורה/שמיני עצרת : Thursday, 20 October, 2011

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

1. ראש השנה : Friday, 30 September, 2011
2. יום כיפור : Saturday, 8 October, 2011