Public holidays
1851, Portugal, Porto
| # | Date | Public holiday |
|---|---|---|
| 1 | Wednesday, 1 January 1851 | Ano Novo |
| 2 | Friday, 18 April 1851 | Sexta-Feira Santa |
| 3 | Friday, 25 April 1851 | Dia da Liberdade |
| 4 | Thursday, 1 May 1851 | Dia do Trabalhador |
| 5 | Tuesday, 10 June 1851 | Dia de Portugal |
| 6 | Thursday, 19 June 1851 | Corpo de Deus |
| 7 | Tuesday, 24 June 1851 | Dia de São João |
| 8 | Friday, 15 August 1851 | Assunção |
| 9 | Sunday, 5 October 1851 | Implantação República |
| 10 | Saturday, 1 November 1851 | Todos os Santos |
| 11 | Monday, 1 December 1851 | Independência |
| 12 | Monday, 8 December 1851 | Imaculada Conceição |
| 13 | Thursday, 25 December 1851 | Natal |