Through there isn’t expected to be a public appearance by the Royal Family to mark the occasion, the day will offer an opportunity for her eldest son, King Charles to reflect on his relationship with his “darling mama”.

Elizabeth gave birth to her first child, Charles, on 14 November 1948 at Buckingham Palace, when she was 22 years old. As her first born, eldest son and heir to the throne, the late monarch always had a special bond with Charles.

Back in 2018, on Prince Charles’ 70th Birthday, Elizabeth delivered a powerful speech in celebration of her son’s special day, which offered a hint at the strength of their relationship.

She described her son as “passionate”, “creative” and as “a duchy original,” as she raised a toast to her heir in front of family, friends and members of European royalty at Buckingham Palace.

And in his first address to the nation as King, the new monarch paid tribute to his “darling Mama” describing her “profound personal commitment” to the nation throughout her 70-year reign.

Here’s a look back over some of their most heartwarming pictures together.

Elizabeth bounces a newborn King Charles on her knee, in 1948. (Getty Images)

Queen Elizabeth holds her first born son on his Christening in 1948. (Getty Images)

Elizabeth with a baby Charles in 1949. (Getty Images)

Queen Elizabeth helping Prince Charles with a camera in the grounds of Balmoral Castle, Scotland, 28 September 1952. (Getty Images)

Elizabeth and a young Charles watching a procession, during the visit of Queen Juliana of the Netherlands, from the wall of Clarence House, in November 1950. (Getty Images)

Elizabeth laughs as her son plays in his toy car while at Balmoral in 1952. (Getty Images)

Prince Charles and his mother looking out of a window at Balmoral in 1952. (Getty Images)

Queen Elizabeth with her eldest son at Windsor Great Park, during a polo match in 1956. (Getty Images)

A youthful Prince Charles and his mother pictured together at their Windsor home in 1969. (Getty Images)

Elizabeth crowns her son Charles, Prince of Wales, during his investiture ceremony at Caernarvon Castle in July 1969. (Getty Images)

The then Prince Charles plants a kiss on his mother’s hand after she presented him with a prize at a polo match in Windsor in 1985. (Getty Images)

The pair laugh as they watch competitors during the Braemar Gathering in September 2006. (Getty Images)

The mother and son duo study one of the first copies of ‘Queen Elizabeth the Queen mother, the official biography’, in September, 2009. (Getty Images)

Elizabeth presents her son with the Royal Horticultural Society’s Victoria Medal of Honour during a visit to the Chelsea Flower Show on May 18, 2009. (Getty Images)

The mother and son laugh whilst watching the children’s sack race as they attend the 2012 Braemar Highland Gathering. (Getty Images)

Charles kisses his mother on the cheek at the funeral of Patricia Knatchbull, Countess Mountbatten of Burma on June 27, 2017. (Getty Images)

A then Prince Charles supports his mother during the State Opening of Parliament in October 2019. (Getty Images)

The pair watch a special flypast from Buckingham Palace balcony following Elizabeth’s Birthday Parade as part of the platinum jubilee celebrations, in London on June 2, 2022. (Getty Images)

Elizabeth and Charles attend the Royal Company of Archers Reddendo Parade in the gardens of the Palace of Holyroodhouse on June 30, 2022 in Edinburgh on July 1, 2022. (Getty Images)

In what appears to be the last image of the duo together, they appear after an Audience at Windsor Castle, Berkshire on July 12, 2022. (PA Images)