Public holidays
1917, Brasil, Piauí
| # | Date | Public holiday |
|---|---|---|
| 1 | Monday, 1 January 1917 | Confraternização Universal |
| 2 | Tuesday, 20 February 1917 | Terça-feira de Carnaval |
| 3 | Friday, 6 April 1917 | Sexta Feira Santa ou Paixão de Cristo |
| 4 | Saturday, 21 April 1917 | Tiradentes |
| 5 | Tuesday, 1 May 1917 | Dia do Trabalho |
| 6 | Thursday, 7 June 1917 | Corpus Christi |
| 7 | Friday, 7 September 1917 | Independência do Brasil |
| 8 | Friday, 12 October 1917 | Nossa Senhora Aparecida |
| 9 | Friday, 19 October 1917 | Dia do Piauí |
| 10 | Friday, 2 November 1917 | Finados |
| 11 | Thursday, 15 November 1917 | Proclamação da República Brasileira |
| 12 | Saturday, 8 December 1917 | Dia de Nossa Senhora da Conceição |
| 13 | Tuesday, 25 December 1917 | Natal |