Byddai'r diwrnod HMS hwn yn benodol at ddibenion Dysgu Proffesiynol i gefnogi athrawon i gyflwyno'r cwricwlwm newydd - a gaiff ei roi ar waith o 2022.
The INSET day would be specifically for the purpose of Professional Learning to support the introduction of the new curriculum – to be rolled out from 2022.