Raja of Perlis’s Birthday is observed in Malaysia on May 17. This celebration marks the birthday of the Raja of Perlis, the hereditary ruler of the smallest state in Malaysia, which is unique as it is the only state where the ruler holds the title of Raja. The origins of this celebration trace back to the establishment of Perlis as a separate vassal state of Siam in the 19th century, with Sayyid Hussain Jamalulail recognized as the first Raja of Perlis. The incumbent Raja, Tuanku Syed Sirajuddin, was born on this date in 1943 and has served as the head of state since his installation in 2000. While the official birthday was celebrated on May 17, it was moved to July 17 during certain years when it coincided with Ramadan. The holiday is an official observance in Perlis, where local customs and celebrations take place to honor the Raja.