Valenzuela City Day, observed in Valenzuela City, Philippines, recurs every February 14. This special working holiday commemorates the conversion of Valenzuela from a municipality to a highly urbanized city in 1998. Originally named Polo, the area has a rich history dating back to its founding in 1623 and has undergone significant changes, including a division into two towns in 1960 and a reunification in 1963. The day features various activities such as concerts, award ceremonies, thanksgiving masses, and job fairs. It is important to distinguish Valenzuela City Day from Valenzuela Foundation Day, which is celebrated on November 12 to mark the founding of Polo.