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How many working days in year 1965?

Here is the detail of the calculation:

Because 1965 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 8 public holidays that do not fall during a weekend and we obtain 253 working days in 1965.

Here is the list of these 8 public holidays:

1. Solenidade da Santa Mãe de Deus : пятница, 1 январь, 1965
2. Sexta-Feira Santa : пятница, 16 апрель, 1965
3. Dia de Portugal : четверг, 10 июнь, 1965
4. Corpo de Deus : четверг, 17 июнь, 1965
5. Implantação da República : вторник, 5 октябрь, 1965
6. Todos os Santos : понедельник, 1 ноябрь, 1965
7. Restauração da Independência : среда, 1 декабрь, 1965
8. Dia da Imaculada Conceição : среда, 8 декабрь, 1965

And here are the 5 public holidays falling on a weekend:

1. Páscoa : воскресенье, 18 апрель, 1965
2. Dia da Liberdade : воскресенье, 25 апрель, 1965
3. Dia do Trabalhador : суббота, 1 май, 1965
4. Assunção de Nossa Senhora : воскресенье, 15 август, 1965
5. Natal : суббота, 25 декабрь, 1965