Christmas is a time for giving, so it’s not surprising that the connection between coins and Christmas has a very long history. Stir-up Sunday, this year on Sunday 20 November, is a lovely Christmas tradition that includes the whole family. The Royal Mint’s silver sixpence plays a very important part in this custom – it’s the day when Christmas puddings should be made in order to give them enough time to mature before Christmas, when every family member can take…