The Premiership tie between Carmarthen Quins and Pontypridd on Saturday 25th February will kick off at 12 noon.
Both clubs have agreed on the amended kick off time, with the England v Wales Triple Crown decider from Twickenham following at 4pm.
Pontypridd meanwhile have three Premiership fixtures still to be re-arranged, namely the games at home to Cross Keys and Carmarthen and away to Swansea.
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Yr Uwch-Gynghrair, Cwpan SWALEC, Cwpan Prydain ac Iwerddon - beth yw gobeithion Ponty o gipio "coron driphlyg" unigryw? The Premiership, SWALEC Cup and British & Irish Cup - what are Ponty's chances of claiming a unique "triple crown"?