Secondary education (Moving up from primary) 1 September 2012 to 31 August 2013 September 2024 20 December 2023 1 March 2024 or the next working day 12 April 2024
Ysgol Uwchradd - (Symud o'r Ysgol Gynradd i'r Ysgol Uwchradd) 1 Medi 2012 tan 31 Awst 2013 Medi 2024 20 Rhagfyr 2023 1 Mawrth 2024 neu'r diwrnod gwaith nesaf 12 Ebrill 2024