English-Portuguese translations for since when

• desde quando
  Desde quando é que a Turquia fica na Europa? Since when has Turkey been in Europe?
  Desde quando é que esta informação se encontra acessível? Since when has this information been transparent?
  Desde quando as autocracias organizam referendos? Since when has an autocracy carried out referenda?
• desde quando?
  A norma europeia ERTMS está disponível desde quando? Since when has the European ERTMS standard been available?
  As especificações relativas aos sistemas nacionais estão disponíveis desde quando? Since when have the specifications for such national systems been available?

Definition of since when

• From what time
• Used to indicate doubt as to the veracity of a statement

Examples

• Since when do I need your permission?
• The moon is made of green cheese. Since when?

Related words

• since
• sincerely
• sincerity
• sincere
• insincerity
• sincereness
• disincentive
• insincere
• insincerely
• desincentivise