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How many working days in year 1942?

Here is the detail of the calculation:

Because 1942 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 1942.

Here is the list of these 10 public holidays:

1. Confraternização Universal : четверг, 1 январь, 1942
2. Terça-feira de Carnaval : вторник, 17 февраль, 1942
3. Sexta Feira Santa ou Paixão de Cristo : пятница, 3 апрель, 1942
4. Tiradentes : вторник, 21 апрель, 1942
5. Dia do Trabalho : пятница, 1 май, 1942
6. Corpus Christi : четверг, 4 июнь, 1942
7. Independência do Brasil : понедельник, 7 сентябрь, 1942
8. Nossa Senhora Aparecida : понедельник, 12 октябрь, 1942
9. Finados : понедельник, 2 ноябрь, 1942
10. Natal : пятница, 25 декабрь, 1942

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

1. Adesão do Grão-Pará à independência do Brasil : суббота, 15 август, 1942
2. Proclamação da República Brasileira : воскресенье, 15 ноябрь, 1942