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How many working days in year 2057?
Here is the detail of the calculation:
Because 2057 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 13 public holidays that do not fall during a weekend and we obtain 248 working days in 2057.
 Here is the list of these 13 public holidays: 
 
 1. Confraternização Universal : понеділок, 1 січень, 2057 
2. Terça-feira de Carnaval : вівторок, 6 березень, 2057 
3. Dia de São José : понеділок, 19 березень, 2057 
4. Sexta Feira Santa ou Paixão de Cristo  : п'ятниця, 20 квітень, 2057 
5. Dia do Trabalho : вівторок, 1 травень, 2057 
6. Corpus Christi : четвер, 21 червень, 2057 
7. Independência do Brasil : п'ятниця, 7 вересень, 2057 
8. Criação do Território Federal : четвер, 13 вересень, 2057 
9. Nossa Senhora Aparecida : п'ятниця, 12 жовтень, 2057 
10. Finados : п'ятниця, 2 листопад, 2057 
11. Proclamação da República Brasileira : четвер, 15 листопад, 2057 
12. Dia Nacional de Zumbi e da Consciência Negra : вівторок, 20 листопад, 2057 
13. Natal : вівторок, 25 грудень, 2057 
And here are the 2 public holidays falling on a weekend:
1. Data magna do estado Ceará : неділя, 25 березень, 2057 
2. Tiradentes : субота, 21 квітень, 2057