March 29, 2014 SHARE First Same-Sex Marriages Take Place From Midnight Gay couple Peter McGraith and David Cabreza stand on the steps of Islington Town Hall after being married shortly after midnight in one of the UK's first same-sex weddings on March 29, 2014 in London. Rob Stothard—Getty Images Great Britain held its first same-sex marriages Saturday, and rainbow-colored flags were flown over government buildings. Prime Minister David Cameron called it a "historic day" in a congratulatory tweet The first same-sex marriages in Britain were held early Saturday morning after gay marriage became legal at midnight. The move to legalize same-sex marriage in England and Wales was lauded by politicians from both parties, the BBC reports. Rainbow-colored flags were flown over government buildings Saturday. “Congratulations to the gay couples who have already been married – and my best wishes to those about to be on this historic day,” United Kingdom Prime Minister David Cameron tweeted Saturday morning. -- — David Cameron (@David_Cameron) March 29, 2014 The Church of England will drop its opposition to same-sex marriage after years of opposition, Archbishop of Canterbury Justin Welby said on Friday night. Polls show about two-thirds of people in the country support gay unions, the Associated Press reports. Gay couples in England have been allowed to enter “civil partnerships,” conferring the same legal rights as marriage, since 2005. Britain banned schools and authorities from “promoting” homosexuality until 2003. Scotland passed a similar law in February that will allow same-sex marriages beginning in October. [BBC]