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How many working days in year 1982?
Here is the detail of the calculation:
Because 1982 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 1982.
 Here is the list of these 8 public holidays: 
 
 1. Solenidade da Santa Mãe de Deus : п'ятниця, 1 січень, 1982 
2. Sexta-Feira Santa : п'ятниця, 9 квітень, 1982 
3. Corpo de Deus : четвер, 10 червень, 1982 
4. Dia de São João : четвер, 24 червень, 1982 
5. Implantação da República : вівторок, 5 жовтень, 1982 
6. Todos os Santos : понеділок, 1 листопад, 1982 
7. Restauração da Independência : середа, 1 грудень, 1982 
8. Dia da Imaculada Conceição : середа, 8 грудень, 1982 
And here are the 5 public holidays falling on a weekend:
1. Páscoa : неділя, 11 квітень, 1982 
2. Dia da Liberdade : неділя, 25 квітень, 1982 
3. Dia do Trabalhador : субота, 1 травень, 1982 
4. Assunção de Nossa Senhora : неділя, 15 серпень, 1982 
5. Natal : субота, 25 грудень, 1982