1990s|President: Ferdinand Marcos (Nacionalista)
Chief Justice: Roberto Concepcion (until April 18), Querube Makalintal (starting April 18)
January 10 – A plebiscite referendum is held among the citizens' assemblies to ratify the new Constitution.
January 15 – Infamous Chinese drug lord Lim Seng faced his public execution by firing squad at a lot behind the Libingan ng mga Bayani in Fort Bonifacio, the country's first and last of its kind in the post-war Philippine history.
July 21 – Miss Philippines Margarita Moran was crowned Miss Universe 1973.
July 27-28 – National referendum was held wherein 90.77% of the Citizen Assemblies voted for the ratification of the 1973 Constitution and the continuation of Martial Law.
November 18-23 – The inaugural Asian Athletics Championships was held in Marikina.
December 1-15 – The 1973 Asian Basketball Confederation Championship were held in Manila.
April – The National Democratic Front (NDF), the united front organization of the Communist Party of the Philippines, is formally organized.
November – Banahaw Broadcasting Corporation began radio-television operations.
January 8 - Keempee de Leon
January 31 - Jay Manalo
February 7 – Angel Aquino
March 2 – Asi Taulava, Filipino-Tongan basketball player
May 25 - Gelli de Belen
September 12 – Kara David, Filipina broadcast journalist
December 13 – Adeline Dumapong, Filipino Paralympic weightlifter.
1973 in the Philippines Wikipedia
1973 in the Philippines details events of note that happened in the Philippines in the year 1973.