King Tupou VI Birthday Celebrations in Nuku'alofa/Nationwide
King Tupou VI's Birthday is a Tongan public holiday observed on July 4 or the following Monday, marking the reigning king's birthday even though his actual birth date falls on July 12. In practice, the celebrations take the form of the Heilala Festival, Tonga's largest annual national event.
Because sourcing directly states this holiday's celebrations take the form of the Heilala Festival, treating it as a fully separate event from Heilala would overstate what is actually a shared occasion.