Public holidays
1988, Brasil, Piauí
| # | Date | Public holiday |
|---|---|---|
| 1 | Friday, 1 January 1988 | Confraternização Universal |
| 2 | Tuesday, 16 February 1988 | Terça-feira de Carnaval |
| 3 | Friday, 1 April 1988 | Sexta Feira Santa ou Paixão de Cristo |
| 4 | Thursday, 21 April 1988 | Tiradentes |
| 5 | Sunday, 1 May 1988 | Dia do Trabalho |
| 6 | Thursday, 2 June 1988 | Corpus Christi |
| 7 | Wednesday, 7 September 1988 | Independência do Brasil |
| 8 | Wednesday, 12 October 1988 | Nossa Senhora Aparecida |
| 9 | Wednesday, 19 October 1988 | Dia do Piauí |
| 10 | Wednesday, 2 November 1988 | Finados |
| 11 | Tuesday, 15 November 1988 | Proclamação da República Brasileira |
| 12 | Thursday, 8 December 1988 | Dia de Nossa Senhora da Conceição |
| 13 | Sunday, 25 December 1988 | Natal |