Secondary education (Moving up from primary) 1 September 2013 to 31 August 2014 September 2025 29 November 2024 1 March 2025 or the next working day 31 March 2025
Ysgol Uwchradd - (Symud o'r Ysgol Gynradd i'r Ysgol Uwchradd) 1 Medi 2013 tan 31 Awst 2014 Medi 2025 29 Tachwedd 2024 1 Mawrth 2025 neu'r diwrnod gwaith nesaf 31 Mawrth 2025