means a day other than a Saturday, a Sunday, Christmas Day, Good Friday or a bank holiday in Wales under the Banking and Financial Dealings Act 1971.
diwrnod heblaw dydd Sadwrn, dydd Sul, Dydd Nadolig, Dydd Gwener y Groglith neu ŵyl banc yng Nghymru o dan Ddeddf Bancio a Thrafodion Ariannol 1971.