Met Eireann has forecast a subzero freeze to return on Tuesday night as the high-pressure system dominating the weather right now is replaced by a low pressure burst.
Taking to Twitter, the Irish forecaster said the exact same high-pressure system was dominating on this exact day in 1964.
A spokesperson wrote: “While high pressure is playing a role in our current settled weather, it also played a significant role on this day's weather back in 1964”.