One Day, Isang Araw (lit. 'One Day, One Day') is a 1988 Filipino action comedy film directed by Pablo Santiago and starring Fernando Poe Jr. and child actress Matet de Leon. Produced by Regal Films, the film was released on August 18, 1988, and was a box-office success. It was also given a positive review by film critic Lav Diaz, who praised its honest depiction of street children in the Philippines.