Hari Hol Pahang is observed in the state of Pahang, Malaysia, on May 22 each year. This public holiday commemorates the death anniversary of the previous Sultan of Pahang, Ahmad Shah, who passed away on this date. The holiday also serves to celebrate his accomplishments and is marked by special prayers in mosques and remembrance ceremonies. The observance was shifted to May 22 following Ahmad Shah's death, previously being held on May 7 in honor of Sultan Abu Bakar. Pahang's history as a sultanate dates back to the 5th century, with significant events including its establishment as a vassal of Melaka in the 15th century and later becoming a British protectorate. Hari Hol Pahang thus reflects both the historical legacy of the sultanate and the cultural practices of the region.