Public holidays
1638, Brasil, Piauí
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1638 | Confraternização Universal |
| 2 | Tuesday, 16 February 1638 | Terça-feira de Carnaval |
| 3 | Friday, 2 April 1638 | Sexta Feira Santa ou Paixão de Cristo |
| 4 | Wednesday, 21 April 1638 | Tiradentes |
| 5 | Saturday, 1 May 1638 | Dia do Trabalho |
| 6 | Thursday, 3 June 1638 | Corpus Christi |
| 7 | Tuesday, 7 September 1638 | Independência do Brasil |
| 8 | Tuesday, 12 October 1638 | Nossa Senhora Aparecida |
| 9 | Tuesday, 19 October 1638 | Dia do Piauí |
| 10 | Tuesday, 2 November 1638 | Finados |
| 11 | Monday, 15 November 1638 | Proclamação da República Brasileira |
| 12 | Saturday, 25 December 1638 | Natal |