January 5–7 – Eight mutinous policemen led by Pat. Rizal Alih take hostagePhilippine Constabulary regional commander Brig. Gen. Eduardo Batalla, his aide, Col. Romeo Abendan, and five others in Camp Cawa-Cawa, Zamboanga City. The siege ends, Jan. 7, in an assault by government forces, destroying buildings in the PC Regional Command headquarters and leaving a general, colonel and 14 renegades dead. Alih escapes; would be arrested in Malaysia in 1994, extradited in 2006, and detained until his death in 2015.[1]
March
March 31 – The famous alleged Marian apparition in Agoo, La Union to Judiel Nieva, a teenager who later become a transgender took place. It was said that the Blessed Virgin appeared on a guava tree, delivering messages and prophecies to Judiel. It became a highly sensational event for many Filipino Catholics as millions of pilgrims came to Agoo to see the phenomena like the "sun dancing", a statue of the Virgin Mary crying tears of blood, etc. The events in Agoo drew the attention of Catholic hierarchy in Rome, which conducted a thorough investigation on the events. In 1993, the events of Agoo apparitions are declared "non constat de supernaturalitate" (condemned) by the Catholic Bishops Conference of the Philippines and the judgment of Bishop Salvador L. Lazo of San Fernando diocese who was its Ordinary during the phenomena.
March 28 – Elections were held in the country's 42,000 barangays.
April
April 21 – U.S. Army Col. James Rowe is assassinated by the Communists in Quezon City; incident prompts the issue of removal of the U.S. military bases from the country.[2] In 1991, the city Regional Trial Court would convict Donato Continente and Juanito Itaas in connection to the incident that also wounds the soldier's driver.[3]
May
May 30 – A mining community in Mount Diwata, Monkayo, then part of Davao del Norte, collapses from heavy rain, resulting in the deaths of thousands, mostly miners, in what would be the worst disaster in the area.[4]
July 13 – A military tribunal acquits 23 soldiers who are charged with murder regarding the deaths of 17 civilians in a military encounter in Lupao, Nueva Ecija in 1987, asserting before that those slain were communist guerrillas.[5]
August 13–15 – A hostage crisis at the Davao Metropolitan District Command Center (Davao Metrodiscom) occurs, perpetrated by the group of inmates led by Felipe Pugoy and Mohammad Nazir Samparani which resulted to the death of five hostages and all 16 inmates.
As per Executive Order No. 292, chapter 7 section 26, the following are regular holidays and special days, approved on July 25, 1987.[11] Note that in the list, holidays in bold are "regular holidays" and those in italics are "nationwide special days".
