Question: When is Duchess Caroline Mariane Of Mecklenburg's husband's birthday?
Sentence (from "Duchess Caroline Mariane of Mecklenburg"): Duchess Caroline Mariane of Mecklenburg (10 January 1821 – 1 June 1876) was a member of the House of Mecklenburg-Strelitz who became The Crown Princess of Denmark as the second spouse of the future king Frederick VII of Denmark.
Relevant evidence: Yes