Bagong Buwan (lit. '"New Moon"') is a 2001 Filipino drama film co-produced and directed by Marilou Diaz-Abaya from a story and screenplay she co-written with Ricky Lee and Jun Lana. It is about the Muslim rebellion in Mindanao, Philippines and its effect on civilians. It has become one of the director's cinematic masterpieces due to making awareness and highlights of a socio-political issue to the cinematic audience.

Produced and distributed by Star Cinema, the film was theatrically released on December 25, 2001, as an official entry of the 27th Metro Manila Film Festival and won seven awards including Best Actor to Cesar Montano, Best Child Performer to Jiro Manio, and Best Original Theme Song to Joey Ayala's Walang Hanggang Paalam. Controversially, the film won the Second Best Picture award, this caused an alarm from Cesar Montano who was dismayed by the winning of the said award to Yamashita: The Tiger's Treasure.

It received an international release in the United States on July 19, 2002, as part of the New York Asian American International Film Festival and in Japan on September 15, 2002, as part of the 12th Fukuoka International Film Festival. The film was restored in high definition by ABS-CBN Film Archives and Central Digital Lab in 2015.