Определить период

...

How many working days in year 2021?

Here is the detail of the calculation:

Because 2021 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 9 public holidays that do not fall during a weekend and we obtain 252 working days in 2021.

Here is the list of these 9 public holidays:

1. Confraternização Universal : пятница, 1 январь, 2021
2. Terça-feira de Carnaval : вторник, 16 февраль, 2021
3. Sexta Feira Santa ou Paixão de Cristo : пятница, 2 апрель, 2021
4. Tiradentes : среда, 21 апрель, 2021
5. Corpus Christi : четверг, 3 июнь, 2021
6. Independência do Brasil : вторник, 7 сентябрь, 2021
7. Nossa Senhora Aparecida : вторник, 12 октябрь, 2021
8. Finados : вторник, 2 ноябрь, 2021
9. Proclamação da República Brasileira : понедельник, 15 ноябрь, 2021

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

1. Dia do Trabalho : суббота, 1 май, 2021
2. Dia Nacional de Zumbi e da Consciência Negra : суббота, 20 ноябрь, 2021
3. Natal : суббота, 25 декабрь, 2021