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How many working days in year 2023?
Here is the detail of the calculation:
Because 2023 is not a leap year, it has 365 days.
Let's remove 52 saturdays and 53 sundays. It remains 260 days.
Now, let's remove 12 public holidays that do not fall during a weekend and we obtain 248 working days in 2023.
 Here is the list of these 12 public holidays: 
 
 1. Criação do estado Rondônia : Wednesday, 4 January, 2023 
2. Terça-feira de Carnaval : Tuesday, 21 February, 2023 
3. Sexta Feira Santa ou Paixão de Cristo  : Friday, 7 April, 2023 
4. Tiradentes : Friday, 21 April, 2023 
5. Dia do Trabalho : Monday, 1 May, 2023 
6. Corpus Christi : Thursday, 8 June, 2023 
7. Independência do Brasil : Thursday, 7 September, 2023 
8. Nossa Senhora Aparecida : Thursday, 12 October, 2023 
9. Finados : Thursday, 2 November, 2023 
10. Proclamação da República Brasileira : Wednesday, 15 November, 2023 
11. Dia Nacional de Zumbi e da Consciência Negra : Monday, 20 November, 2023 
12. Natal : Monday, 25 December, 2023 
And here are the 2 public holidays falling on a weekend:
1. Confraternização Universal : Sunday, 1 January, 2023 
2. Dia do evangélico : Sunday, 18 June, 2023