The definition that the UK Met Office uses to define a white Christmas is for one snowflake to be observed falling in the 24 hours of December 25 somewhere in the UK. Traditionally a single location in the country was used to define a white Christmas, which was the Met Office building in London. However, with the increase in betting on where will see a white Christmas, the number of locations has increased and can now include sites such as Buckingham Palace, Belfast (Aldergrove Airport), Aberdeen (Pittodrie Stadium, Aberdeen FC), Edinburgh (Castle), Coronation Street in Manchester and the Millennium Stadium in Cardiff. For most parts of the United Kingdom, Christmas is only at the beginning of the period when it’s likely to snow. We are more likely to see snow between January and March than in December, with snow or sleet falling an average 3.9 days in December, compared to 5.3 days in January, 5.6 days in February and 4.2 days in March.