National Father's Day in Thailand is celebrated on December 5 each year and is a national holiday during which schools and businesses are closed. This day honors fatherhood and allows Thai people to express gratitude towards their fathers and father figures for their contributions to their lives. Traditional customs include presenting small gifts or signs of appreciation, with the canna flower, known as ‘dok phuttha raksa,’ being a common token of honor. The celebration is also linked to the birthday of King Bhumibol, a revered figure in Thailand, whose legacy is commemorated through various festivities and events. The significance of this day reflects the cultural values of respect and appreciation for family.