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How many working days in year 1963?

Here is the detail of the calculation:

Because 1963 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 10 public holidays that do not fall during a weekend and we obtain 251 working days in 1963.

Here is the list of these 10 public holidays:

1. Confraternização Universal : вторник, 1 январь, 1963
2. Terça-feira de Carnaval : вторник, 26 февраль, 1963
3. Dia de São José : вторник, 19 март, 1963
4. Data magna do estado Ceará : понедельник, 25 март, 1963
5. Sexta Feira Santa ou Paixão de Cristo : пятница, 12 апрель, 1963
6. Dia do Trabalho : среда, 1 май, 1963
7. Corpus Christi : четверг, 13 июнь, 1963
8. Criação do Território Federal : пятница, 13 сентябрь, 1963
9. Proclamação da República Brasileira : пятница, 15 ноябрь, 1963
10. Natal : среда, 25 декабрь, 1963

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

1. Tiradentes : воскресенье, 21 апрель, 1963
2. Independência do Brasil : суббота, 7 сентябрь, 1963
3. Nossa Senhora Aparecida : суббота, 12 октябрь, 1963
4. Finados : суббота, 2 ноябрь, 1963