Public holidays
1878, Brasil, Piauí
| # | Date | Public holiday |
|---|---|---|
| 1 | Tuesday, 1 January 1878 | New Year's Day |
| 2 | Tuesday, 5 March 1878 | Carnival Tuesday |
| 3 | Friday, 19 April 1878 | Good Friday |
| 4 | Sunday, 21 April 1878 | Tiradentes Day |
| 5 | Wednesday, 1 May 1878 | Labour Day |
| 6 | Thursday, 20 June 1878 | Corpus Christi |
| 7 | Saturday, 7 September 1878 | Independence Day |
| 8 | Saturday, 12 October 1878 | Our Lady of Aparecida |
| 9 | Saturday, 19 October 1878 | Piauí Day |
| 10 | Saturday, 2 November 1878 | All Souls' Day |
| 11 | Friday, 15 November 1878 | Republic Proclamation Day |
| 12 | Sunday, 8 December 1878 | Immaculate Conception |
| 13 | Wednesday, 25 December 1878 | Christmas Day |