Prince William shares throwback pic of him and Prince Harry with mom Princess Diana

Rachel McRady‍

Sweet childhood memories!

Prince William is feeling nostalgic this Monday as he celebrates 999 Day — a special day commemorating those who work in the emergency services. In the United Kingdom, residents dial 9-9-9 instead of 9-1-1 in emergency situations.

In honor of the special occasion, the Kensington Royal account shared a sweet throwback photo of Prince William and his younger brother, Prince Harry, in pale blue coats wearing silver helmets and posing on a fire truck with their cousins.

“The first photograph in this post is of The Duke of Cambridge and The Duke of Sussex and their mother Diana, Princess of Wales, with their cousins Peter Phillips and Zara Tindall in the yard of the Old Fire Station in the grounds of Sandringham House in 1988,” the caption reads.

View this post on Instagram

Today marks #999DayUK, when we celebrate and say thank you to our incredible Police, Fire and Emergency Medical services 👮‍♀👨‍🚒👩‍⚕ and all our specialised emergency services for all that they do to keep us safe. The first photograph in this post is of The Duke of Cambridge and The Duke of Sussex and their mother Diana, Princess of Wales, with their cousins Peter Phillips and Zara Tindall in the yard of the Old Fire Station 🚒 in the grounds of Sandringham House in 1988. On 999 Day later today The Duke will visit @TheFirefightersCharity at Harcombe House in Devon to hear about the support that the centre provides to members of the fire and rescue service and their families, and meet representatives from across the emergency services sector. On the extraordinary work of our emergency services, The Duke of Cambridge said: "As a society, we owe our wellbeing, and indeed our lives, to the men and women in our emergency services who work tirelessly to protect us in some of the most difficult circumstances. It is only fitting that we should recognise the vital role that they play, and pay tribute to the bravery and dedication of those who have made the ultimate sacrifice for their communities." 999 Day begins annually at 9am on the 9th September (the 9th hour of the 9th day of the 9th month) and is held to pay tribute to the invaluable work that is carried out by the emergency services and responders. 📷 Getty images / Press Association

A post shared by Duke and Duchess of Cambridge (@kensingtonroyal) on Sep 9, 2019 at 2:42am PDT

In the photo, the late Princess Diana is wearing a beret over her short blonde locks, watching her kids and their cousins playing on the truck.

Prince William has always felt a special connection to the emergency services as a former air ambulance pilot himself. The caption also quotes Prince William’s thoughts on emergency services, saying, “As a society, we owe our wellbeing, and indeed our lives, to the men and women in our emergency services who work tirelessly to protect us in some of the most difficult circumstances.”

For the special day, Prince William is visiting the Fire Fighters Charity’s Harcombe House in Devon, England, to learn more about the services they provide.

See more photos of Prince William with his late mother:

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