Define a period

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How many working days in year 2013?

Here is the detail of the calculation:

Because 2013 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 2013.

Here is the list of these 7 public holidays:

1. Pesach : Tuesday, 26 March, 2013
2. Shvi'i shel Pesach : Monday, 1 April, 2013
3. Yom Ha-Atzmaut : Tuesday, 16 April, 2013
4. Shavuot : Wednesday, 15 May, 2013
5. Rosh Hashanah : Thursday, 5 September, 2013
6. Sukkot : Thursday, 19 September, 2013
7. Shemini Atzeret / Simchat Torah : Thursday, 26 September, 2013

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

1. Rosh Hashanah : Friday, 6 September, 2013
2. Yom Kippur : Saturday, 14 September, 2013