S4C Newyddion S4C a'r Tywydd. S4C News & Weather. 2026-05-28 Cystadlaethau'r plant Cynradd - Cân actol a Pherfformiad theatrig i ysgolion ac Adrannau a'r canlyniadau gyda Mari Lovgreen. Primary competitions - cân actol and theatrical performance. 2026-05-28 Newyddion S4C a'r Tywydd. S4C News & Weather. 2026-05-28 Darllediad byw o brif Seremoni'r Dydd: Defod Y Cadeirio. The highlight of the day - a live broadcast of the main ceremony, the Chairing Ceremony. 2026-05-28 Ymunwch â'r criw ar gyfer cystadlaethau'r plant Cynradd - Cân actol a Pherfformiad theatrig. We look forward to the Primary competitions - Cân Actol and theatrical performances. 2026-05-28