National Tonga Day
National Tonga Day is held on November 4. This event in the first decade of the month November is annual. 
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Tonga celebrates Tonga National Day every 4 November to commemorate the adoption of its constitution back in 1875, upon approval from King George Tupou I. Tonga is a constitutional monarchy and a member of the British Commonwealth. Its agrarian economy is developing, and its tourist industry, although limited, is growing.
Tonga is an archipelago of 169 islands of which only 36 are inhabited. British explorer James Cook visited Tonga in 1773. Tonga is the home of the humpback whales.
Uniquely, Tonga has also never lost its indigenous governance. After over 1000 years of rule, today's monarchy and its structure still remain the most powerful and influential entity in Tonga.
Similar holidays and events, festivals and interesting facts
White Sunday in Samoa and Tonga on October 12 (celebrated on the second Sunday in October);
Primate Pride Day on November 24
Tupou I Day in Tonga on December 4
Anzac Day on April 25 (Australia, New Zealand, Nauru, Solomon Islands, Tonga and Western Samoa. It commemorates the landing of the Australian and New Zealand Army Corps - ANZAC - on the Gallipoli peninsula in 1915);
Mother’s Day on May 11 (Anguilla, Antigua and Barbuda, Aruba, Australia, Austria, Bahamas, Bangladesh, Barbados, Belgium, Belize, Bermuda, Bhutan, Bonaire, Botswana, Brazil, Brunei, Canada, Cambodia, Cayman Islands, Central African Republic, Chad, Chile, China, Colombia, Congo, Dem. Rep., Congo, Rep., Cote d'Ivoire, Croatia, Cuba, Curaçao, Cyprus, Czech Republic, Denmark, Dominica, Ecuador, Equatorial Guinea, Estonia, Ethiopia, Faroe Islands, Fiji, Finland, Germany, Gabon, Gambia, Greenland, Ghana, Greece, Grenada, Guyana, Honduras, Hong Kong, Iceland, India, Italy, Jamaica, Japan, Kenya, Latvia, Liberia, Liechtenstein, Macau, Malaysia, Malta, Myanmar, Namibia, Netherlands, New Zealand, Pakistan, Papua New Guinea, Peru, Philippines, Puerto Rico, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines, Samoa, Singapore, Sint Maarten, Slovakia, South Africa, Sri Lanka, Suriname, Switzerland, Taiwan, Tanzania, Tonga, Trinidad and Tobago, Turkey, Uganda, Ukraine, United States, Uruguay, Vietnam, Venezuela, Zambia, Zimbabwe);
Father's Day in Tonga on May 18 (Third Sunday in May);
Tonga Emancipation Day or Independence Day on June 2 (Can be moved to a Monday. Commemorates the abolition of serfdom in Tonga by King George Tupou in 1862, and the independence of Tonga from the British protectorate in 1970)