Public holidays
1640, Portugal, Sintra
| # | Date | Public holiday |
|---|---|---|
| 1 | Sunday, 1 January 1640 | Ano Novo |
| 2 | Friday, 6 April 1640 | Sexta-Feira Santa |
| 3 | Wednesday, 25 April 1640 | Dia da Liberdade |
| 4 | Tuesday, 1 May 1640 | Dia do Trabalhador |
| 5 | Thursday, 7 June 1640 | Corpo de Deus |
| 6 | Sunday, 10 June 1640 | Dia de Portugal |
| 7 | Friday, 29 June 1640 | Dia de São Pedro |
| 8 | Wednesday, 15 August 1640 | Assunção |
| 9 | Friday, 5 October 1640 | Implantação República |
| 10 | Thursday, 1 November 1640 | Todos os Santos |
| 11 | Saturday, 1 December 1640 | Independência |
| 12 | Saturday, 8 December 1640 | Imaculada Conceição |
| 13 | Tuesday, 25 December 1640 | Natal |