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How many working days in year 2000?

Here is the detail of the calculation:

Because 2000 is a leap year, it has 366 days.

Let's remove 52 saturdays and 53 sundays. It remains 261 days.

Now, let's remove 6 public holidays that do not fall during a weekend and we obtain 255 working days in 2000.

Here is the list of these 6 public holidays:

1. Purim : вторник, 21 март, 2000
2. Pesach : четверг, 20 апрель, 2000
3. Shvi'i shel Pesach : среда, 26 апрель, 2000
4. Yom Ha-Atzmaut : среда, 10 май, 2000
5. Rosh Hashanah : воскресенье, 1 октябрь, 2000
6. Yom Kippur : понедельник, 9 октябрь, 2000

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

1. Shavuot : пятница, 9 июнь, 2000
2. Rosh Hashanah : суббота, 30 сентябрь, 2000
3. Sukkot : суббота, 14 октябрь, 2000
4. Shemini Atzeret / Simchat Torah : суббота, 21 октябрь, 2000