King Bhumipol Adulyadej was born on December 5, and this day is now celebrated as Father’s Day across Thailand. Thai people may give a dok Buddha ruksa (also known as a canna flower) to their fathers and grandfathers on this day. Many people also wear yellow, which is the king’s color. This day is also celebrated as National Day. The reverence in which the people of Thailand hold their king cannot be overestimated.