Public holidays
1845, Brasil, Piauí
| # | Date | Public holiday |
|---|---|---|
| 1 | Wednesday, 1 January 1845 | New Year's Day |
| 2 | Tuesday, 4 February 1845 | Carnival Tuesday |
| 3 | Friday, 21 March 1845 | Good Friday |
| 4 | Monday, 21 April 1845 | Tiradentes Day |
| 5 | Thursday, 1 May 1845 | Labour Day |
| 6 | Thursday, 22 May 1845 | Corpus Christi |
| 7 | Sunday, 7 September 1845 | Independence Day |
| 8 | Sunday, 12 October 1845 | Our Lady of Aparecida |
| 9 | Sunday, 19 October 1845 | Piauí Day |
| 10 | Sunday, 2 November 1845 | All Souls' Day |
| 11 | Saturday, 15 November 1845 | Republic Proclamation Day |
| 12 | Monday, 8 December 1845 | Immaculate Conception |
| 13 | Thursday, 25 December 1845 | Christmas Day |