Unfortunately, the work doesn’t stop for Prince William just because it’s his wife Kate Middleton‘s birthday! The Duke of Cambridge visited London’s Air Ambulance on Wednesday, Jan. 9 despite the fact that the Duchess of Sussex is celebrating 37 years.

However, we’re sure Kate understood her hubby had to go on this important outing. Kensington Palace so nicely updated us on the father-of-three’s visit, and even shared some exciting news. “The Duke of Cambridge has today become Patron of @LDNairamb’s #30YearsSavingLives campaign — which aims to highlight the charity’s vital work in delivering life-saving treatment across London, and raise support for the development of new facilities,” they wrote on Twitter. Congrats, Will!

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The palace then went into further detail about Will’s new role. “London’s Air Ambulance has been providing life-saving treatment to the 10 million people who live and work in London for 30 years. The Duke of Cambridge visited @LDNairamb to learn more about the challenges of working as a first responder in the capital #30YearsSavingLives,” they continued. “As #30YearsSavingLives Patron, The Duke of Cambridge will champion those working on the frontline, and highlight the importance of @LDNairamb’s rapid response to incidents, and cutting-edge medical care.”

Another tweet read, “Through his work as an air ambulance pilot for the @EastAngliAirAmb, The Duke has seen first-hand the impact @LDNairamp first responders have upon the lives of patients with critical injuries.”

It’s so sweet of Will to attend this special event even though it’s Kate’s birthday. But not to worry, Kate’s day was made extra special by her two older kids, Prince George and Princess Charlotte, and her mom, Carole Middleton.

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“George and Charlotte have already made their mom birthday cards in their arts and craft class,” a source exclusively told Closer Weekly. “Whilst they’re at school during the day, Carole will celebrate with Kate by popping open a bottle of champagne and enjoying a nice lunch!” Hopefully, she and Will can enjoy some alone time when he gets home!

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