2015 Greek bailout referendum
A referendum to decide whether Greece should accept the bailout conditions in the country's government-debt crisis proposed jointly by the European Commission (EC), the International Monetary Fund (IMF) and the European Central Bank (ECB) on 25 June 2015 took place on 5 July 2015. The referendum was announced by Prime Minister Alexis Tsipras in the early morning of 27 June 2015 and ratified the following day by the Parliament and the President.
Source: Wikipedia — 2015 Greek bailout referendum (CC BY-SA 4.0)