Public holidays
1938, Brasil, Piauí
| # | Date | Public holiday |
|---|---|---|
| 1 | Saturday, 1 January 1938 | New Year's Day |
| 2 | Tuesday, 1 March 1938 | Carnival Tuesday |
| 3 | Friday, 15 April 1938 | Good Friday |
| 4 | Thursday, 21 April 1938 | Tiradentes Day |
| 5 | Sunday, 1 May 1938 | Labour Day |
| 6 | Thursday, 16 June 1938 | Corpus Christi |
| 7 | Wednesday, 7 September 1938 | Independence Day |
| 8 | Wednesday, 12 October 1938 | Our Lady of Aparecida |
| 9 | Wednesday, 19 October 1938 | Piauí Day |
| 10 | Wednesday, 2 November 1938 | All Souls' Day |
| 11 | Tuesday, 15 November 1938 | Republic Proclamation Day |
| 12 | Thursday, 8 December 1938 | Immaculate Conception |
| 13 | Sunday, 25 December 1938 | Christmas Day |