Caloocan will be celebrating the 51st anniversary of its cityhood this February 16. Caloocan City Day falls on a Saturday this year. The day is a special non-working holiday in the city according to Republic Act 7550, which was enacted in May 1992 during the term of then-President Corazon Aquino. Read the full text of RA 7550 here.
Formerly a component municipality of Rizal province, Caloocan was converted into a city through Republic Act 3278 (access its full text here). RA 3278 was signed into law by then-President Diosdado Macapagal in 1961. The residents of Caloocan approved the law in a plebiscite held February 16 of the following year.