Via The New York Times:
Irish citizens in places as far-flung as Australia and California were flying back to their home country on Friday to cast ballots in a referendum that could make Ireland the first country to adopt same-sex marriage by a popular vote.
A social media campaign in support of same-sex marriage and aimed at Irish citizens abroad urged them to come home for the vote, and a stream of expatriates answered the call in airports around the country. Voting is allowed only in Ireland; it is not possible to mail ballots from abroad.
A carriage filled with supporters of same-sex marriage and adorned with balloons with the word “love” made its way from London to Holyhead, Wales, where would-be voters then journeyed by boat to Dublin.