The Prime Minister’s Office is responsible for declaring and publishing the official calendar of public holidays for the Kingdom of Tonga under the Public Holidays Act.

• New Year’s Day: January 1
• Good Friday: April 18
• Easter Monday: April 21
• ANZAC Day: April 25 
• Birthday of His Majesty King Tupou VI: July 4 
• Crown Prince Tupouto’a-‘Ulukalala’s Birthday: September 17 
• Constitution Day: November 4
• Christmas Day: December 25 
• Boxing Day: December 26 

When a public holiday falls on a Sunday, the following Monday is observed as a holiday. Additional special holidays may be declared by the Prime Minister for specific occasions.