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How many working days in year 2101?

Here is the detail of the calculation:

Because 2101 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 2101.

Here is the list of these 5 public holidays:

1. Independence Movement Day : вторник, 1 март, 2101
2. Children's Day : четверг, 5 май, 2101
3. Memorial Day : понедельник, 6 июнь, 2101
4. Liberation Day : понедельник, 15 август, 2101
5. National Foundation Day : понедельник, 3 октябрь, 2101

And here are the 3 public holidays falling on a weekend:

1. New Year's Day : суббота, 1 январь, 2101
2. Hangeul Day : воскресенье, 9 октябрь, 2101
3. Christmas Day : воскресенье, 25 декабрь, 2101