Those who were between 10 years and 13 years and 5 months from their normal pension age on 1 April 2012 will have switched into alpha sometime between 1 June 2015 and 1 February 2022.
Bydd y rhai hynny a oedd rhwng 10 mlynedd a 13 mlynedd a 5 mis o'u hoed pensiwn arferol ar 1 Ebrill 2012 yn newid i alpha rhywbryd rhwng 1 Mehefin 2015 a 1 Chwefror 2022.