Oherwydd eu gwaith caled bu modd iddynt gytuno ar ddyddiadau cyson ledled Cymru ar gyfer pob gwyliau ysgol ac eithrio hanner tymor y Gwanwyn ym 2019. Mae un set o awdurdodau lleol (17) a’u hysgolion gwirfoddol a gynorthwyir ac ysgolion sefydledig wedi dewis 25 Chwefror i 1 Mawrth 2019, tra bod yr awdurdodau eraill, o’r consortiwm Gwasanaeth Cyflawni Addysg yn Ne-ddwyrain Cymru, wedi dewis wythnos yn gynharach, sef 18 Chwefror i 22 Chwefror.
Due to their hard work they were able to agree consistent dates across Wales for all school holidays except the spring half term in 2019. One set of local authorities (17) and their VA and foundation schools chose the 25 February to 1 March 2019, whilst the other authorities, from the Education Achievement Service consortium covering South East Wales, chose a week earlier, i.e. 18 February to 22 February.