Each 17 September is a public holiday in Tonga to celebrate the birthday of Prince Tupoto’a-‘Ulukalala.
|2019||17 Sep||Tue||Prince Tupoto'a-'Ulukalala's Birthday|
|2020||17 Sep||Thu||Prince Tupoto'a-'Ulukalala's Birthday|
Prince Tupoto’a-‘Ulukalala’s Birthday is kept because this prince is the crown prince, heir to the throne of Tonga, a constitutional monarchy. The generic name for the holiday is simply “Birthday of the Heir to the Crown of Tonga”, and the date will change depending on who exactly is the heir at any given time.
After his father, King Tupou VI, ascended the throne in 2012, Tupoto’a-‘Ulukalala became the heir-apparent to the Tongan throne and his birthday automatically became a national holiday. His son, Taufaʻahau Manumataongo, is second in line to the throne, and his birthday will become a holiday when his father one day becomes king.
There are not many special events on Prince Tupoto’a-‘Ulukalala’s Birthday, aside from his actual birthday party. But the people of Tonga do get the holiday as an off-work day.