Prince Christian celebrated his 12th birthday on Sunday, 15 October 2017.
The Danish Royal Court issued a photo, which was taken by his mother Crown Princess Mary aboard Dannebrog, to mark the occasion.
Queen Margrethe II’s eldest grandson, Prince Christian Valdemar Henri John, Count of Monpezat, was born at 1.57 am on 15 October 2005 at Rigshospitalet (Copenhagen University Hospital).
A 21-gun salute was fired from the Sixtus Battery at Holmen in Copenhagen and at Kronborg Castle to mark the birth of a royal baby.
He was christened in the Christiansborg Palace Chapel on 21 January 2006 with Prince Joachim, Crown Prince Haakon and Crown Princess Mette-Marit of Norway, Crown Princess Victoria of Sweden and his maternal aunt Jane Stephens chosen as some of his godparents.
Prince Christian is second in the line of succession to the Danish throne, following his father Crown Prince Frederik, and, if he becomes King, he will be the first monarch with Australian ancestry.
Prince Christian was one of the page boys at his godmother Crown Princess Victoria’s wedding to Daniel Westling in 2010.
He began attending Tranegård School in 2011, followed by his sister Isabella in 2013 and twins, Vincent and Josephine in 2017.
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