The family is is expected to gather for a special tea party at their country home, Anmer Hall.
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As he did on July 8, George joined his parents at an air show – this time on Saturday to meet members of the British elite forces, the Special Air Service.
The outing, at a camp in western England, commemorated the crack regiment’s 75th anniversary.
No pictures were allowed of the royal visit, but airplane fan George no doubt loved seeing the Red Arrow aeronautical display team again. There were also WWII planes on show at the anniversary party attended by about 5,000 past and present troops.
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William and Kate unveiled a statue to commemorate the sacrifices and contribution made by the troops since their formation during WWII.
William has had a longstanding relationship with the regiment, visiting them privately over the years.