The next European elections will take place between 23 and 26 May next year.
The date was decided by a vote of the European Parliament's Committee on Constitutional Affairs this evening.
The elections will see Ireland gain two more seats with its representation of MEPs rising from 11 to 13 arising from the decision of the UK to leave the EU.
Fine Gael MEP, and first Vice President of the Parliament Mairead McGuinness has called on the Government to urgently look at Ireland's electoral boundaries to accommodate the new seats.
The addition of two new seats will require a boundary change.
There are currently three European Constituencies in the Republic of Ireland, Dublin which has three seats, Midlands North West with four seats, and South which also has four seats.