Sandringham time
Sandringham time is the name given to the idiosyncratic alterations that King Edward VII made to the timekeeping at the royal estate of Sandringham. This time corresponds to, and was used between 1901 and 1936.
Contrary to rumour, it was not begun to assist Queen Alexandra, who was constantly late, but to "create" more evening daylight for hunting in the winter.
The King ordered that all the clocks on the estate be set half an hour ahead of Greenwich Mean Time. In later years the practice was also observed at Windsor and Balmoral Castle. The custom of Sandringham time continued after the death of Edward, through the reign of his son King George V. However, because of the confusions that the time difference caused, which were heightened during George's final hours, King Edward VIII abolished the tradition during his brief reign. Neither King George VI nor Queen Elizabeth II chose to restore the tradition.
