In the last century, Ireland has undeniably undergone quite the transformation.

Many moments have been tense, awe-inspiring or controversial and many have planted a small island firmly on the international stage.

But what is the island's greatest moment of the last 100 years?

That is the question you. the listener, can help answer as we survey the public opinion.

Join The Hard Shoulder after 6pm when the question is up for discussion and let us know why you believe a certain moment should claim the title.

You can now vote for one of 20 iconic moments through this survey, the results of which will determine Ireland's ultimate greatest moment.

In the running are sports moments like Italia 90' and Katie Taylor's Olympic gold, as well as monumental music moments such as U2's Joshua Tree and Garth Brooks' 5-night Croke Park run.

Perhaps the greatest moments were in the social movements that changed the island, such as repealing the eighth amendment or electing the country's first woman president.

Have your say now by voting here.