In Thailand, Father's Day is set as the birthday of the king.[36] December 5 is the birthday of the current king, Bhumibol Adulyadej (Rama IX). Traditionally, Thais celebrate by giving their father or grandfather a Canna flower (ดอกพุทธรักษา Dok Buddha Ruksa), which is considered a masculine flower; however, this is not as commonly practiced today. Thai people will wear yellow on this day to show respect for the king, because yellow is the Color of the day for Monday, the day King Bhumibol Adulyadej was born. In 2007, King Bhumibol Adulyadej was seen leaving the hospital wearing a baby pink blazer. Today, Thais wear pink instead of the yellow.
It first gained nationwide popularity in the 1980s as part of a campaign by Prime Minister Prem Tinsulanonda to promote Thailand's royal family.[36] Mother's Day is celebrated on the birthday of Queen Sirikit,[36] August 12.