The Queen and the Duke of Edinburgh have spent every Christmas at their Sandringham Estate since 1988.

Despite it being tradition for festive decorations to come down after the 12th night, the Queen reportedly keeps hers up for another month until February 6, when she returns to Buckingham Palace.

Queen Elizabeth II keeps Christmas decorations up into February

The reason behind the unusual date is that it is the anniversary of her father, King George VI, passing away at Sandringham in 1952, when she was just 25-years-old.

It has been widely reported that to mark the date, the Queen likes to stay on the estate with the trees and decorations still up, according to Independent.

The Queen outlined her special relationship with her father in a letter to her secretary following his death in 1952, she said: “It all seems so unbelievable still that my father is no longer here and it is only after some time has passed one begins to realise how much he is missed.”

In her annual Christmas broadcast last year, Queen Elizabeth II, made a touching reference to King George VI in reference to the 75th anniversary of the D-Day landings.

She said: “This year we marked another important anniversary: D-Day. On June 6, 1944, some 156,000 British, Canadian and American forces landed in northern France.

“It was the largest ever seabourne invasion and was delayed due to bad weather.

“I well remember the look of concern on my father’s face. He knew the secret D-Day plans but could of course share that burden with no one.”

The Sandringham Estate has been owned by the royal family since 1862, when it was purchased for one of Queen Victoria 's sons, Albert Edward, who later became King Edward VII.