Royal duties wait for no one.

On Wednesday, January 9, Kate Middleton will be turning the gracious age of 37-years-old. And as a royal, with the world at your feet, you'd expect that each and every birthday would be marked with a massive bash or a lavish getaway but, the reality is actually far more humble. For Duchess Kate's 37th, it even looks like her husband, Prince William, won't be in attendance as he's scheduled for royal duties that day. Yes, the Duke of Cambridge is set to visit staff at London's Air Ambulance which is celebrating its 30th anniversary this year. William is rumoured to be spending the greater part of the day meeting with the charity at the Royal London Hospital in Whitechapel, and then joining them alongside patients and their families for a tea party to mark the special anniversary. The event is being held in London which means that once it ends we're sure William will be making a beeline for Kensington Estate to spend the rest of the evening alongside his wife and three children, Prince George, Princess Charlotte and Prince Louis. It hasn't been confirmed yet if they're any exciting birthday plans prepared for the Cambridge family but, we'll keep an eye out.