Straight couples in England and Wales will be able to enter into a civil partnership, a status previously only available to same-sex couples, the prime minister announced Tuesday.
The vote, condemned by numerous rights groups, is to be held on Oct 6-7.
Campaigners have hit out after senators in Romania backed calls for a referendum that could make it harder for gay marriage to be legalised.
European court rules in favour of American-Romanian gay couple who wanted to settle in Romania, which doesn't recognise same-sex marriage
Top court rules in favour of baker who refused service to same-sex couple
Best friends Matt Murphy and Michael O'Sullivan got married in the Irish capital. They are heterosexual and decided to tie the knot so that O'Sullivan wouldn't have to pay inheritance tax on Murphy's house after his death.
Bermuda will ban same-sex marriage months after it was legalised by the island's Supreme Court.
The Australian ambassador to France popped the question in a video posted on social media
Only four MPs voted against the move.
The move brings Austria into line with many other European nations.
Victorian MP Tim Wilson proposed to his partner, Ryan Bolger, during Question Time in Parliament
Officials declare the results of a nationwide postal survey after years of fierce public and political debate
Same-sex couples married in Germany for the first time on Sunday, with several dozen couples tying the knot at civil registry offices that opened
Sydney holds Australia's biggest-ever LGBT marriage equality rally, while the Conservatives' Malcolm Turnbull comes out in favour ahead of postal plebicite.
Australia's High Court has rejected two legal challenges to the centre-right coalition government's proposed postal vote on whether to legalise same-sex marriage.
Australia's High Court has begun hearing a legal challenge against the government's plan to hold a postal vote on whether to legalise same-sex marriage
It has turned into a complex political and legal issue that has divided public opinion, but the Australian government says it is confident it has
More than a dozen European countries have legalised it since the turn of the century
The EU's smallest nation is the 24th country in the world to legalise same-sex marriage
germany is the 14th in Europe and 23rd in the world to legalise same-sex weddings
Questions marks over Czech Republic, Ireland, Finland, the UK and France.
The parliament voted by 393 votes in favour of same-sex unions to 226 against.
SPD leader Martin Schulz says his party will push for a vote in parliament this week, before the start of the summer recess.
It comes after other parties warned that an agreement on gay marriage would be a condition of any coalition deal with Merkel’s Christian Democrats (CDU).
A heterosexual couple in Britain have lost a court bid aimed at allowing them to enter into a civil partnership.
Taiwan's parliament has relaxed rules against same-sex marriage, with opponents and supporters demonstrating outside parliament.