Question: When was the sports center that hosted the first annual multi-sport event involving student-athletes from 18 regions of the Philippines outside Metro Manila built?

Context articles: List of tallest buildings in Cebu City
SM Delgado
Manila Light Rail Transit System Line 2
Pelaéz Sports Complex
Transportation in Metro Manila
Masinag LRT station
List of ZIP codes in the Philippines
Palarong Pambansa
Cebu Business Park
Manila Light Rail Transit System

Metro Cebu is one of the metropolitan areas in the Philippines having numerous skyscrapers outside Metro Manila.
 Through the years, many highrise buildings were sprouting in Cebu City and Metro Cebu.
 Currently, Horizons 101 is the tallest building in the metro and outside Metro Manila.
SM Delgado is a department store owned by SM Land Inc. and operated by Metro Manila Shopping Mecca Corporation, the same arm of the SM Group that operate the branches at SM City Manila and SM City Santa Rosa.
 It is located within Iloilo City's commercial district along Delgado and Valeria Streets.
 It opened in May 1979 and was relaunched in the year 2004.
 It is the 4th SM Department Store built by Henry Sy Sr. and the first branch opened outside Metro Manila.
 SM Supermarket was conceptualized and opened its store at SM Delgado in 1985.
 The mall was relaunched in 2004.
The Manila Light Rail Transit System Line 2, also known as LRT Line 2, LRT-2, or Megatren, is a rapid transit line in Metro Manila in the Philippines, generally running in an east-west direction along the Radial Road 6 and a portion of the Circumferential Road 1.
 Although operated by the Light Rail Transit Authority, resulting in its being called "LRT-2", it is actually a heavy rail, rapid transit system owing to its use of electric multiple units instead of the light rail vehicles used in earlier lines and is the only line utilizing such type of system in the country.
 Envisioned in the 1970s as part of the Metropolitan Manila Strategic Mass Rail Transit Development Plan, the eleven-station, 13.8 km line was the third rapid transit line to be built in Metro Manila when it started operations in 2003.
 It is operated by the Light Rail Transit Authority (LRTA), a government-owned and controlled corporation attached to the Department of Transportation (DOTr) under an official development assistance scheme.
Don Gregorio Pelaéz Sports Complex is a group of sports facilities in Cagayan de Oro.
 This sports center was built in 1969 and hosted the first Palarong Pambansa outside Metro Manila in 1975.
 It is the oldest sports park in Northern Mindanao and it first opened its door to baseball and basketball in 1970.
 Also, the stadium was the largest in Mindanao since 1998 after its renovation.
The transportation system of Metro Manila is a cooperation of complex systems of infrastructure.
 The first automobile and trams in the Philippines first ran through the city.
 Throughout the metropolis, different means of transportation can be used such as buses, jeepneys, taxis, trains, tricycles, and even horse carriages (Kalesa), which are now only used in the major streets of Manila.
 Metro Manila is served by three different railway networks: the Manila Light Rail Transit System (composed of LRT-1 and LRT-2), the Manila Metro Rail Transit System (composed of the MRT-3) and the Philippine National Railways (composed of the PNR Metro Commuter).
 Manila is also the headquarters of the main terminal of the Philippine National Railways.
Masinag Station is a proposed station on the Manila Light Rail Transit System Line 2 (LRT-2) in the Philippines.
 It is part of the LRT Line 2 East Extension.
 The LRT-2 east extension plan calls for an elevated 2-station, 4.14-kilometer extension eastward from Santolan, which means that this station would be above ground.
 The station would be the first LRT-2 station outside Metro Manila, being located in Antipolo in Rizal.
In the Philippines, the Philippine ZIP code is used by the Philippine Postal Corporation (Philpost) to simplify the distribution of mail.
 While in function it is similar to the ZIP code used in the United States, its form and its usage is quite different.
 The use of ZIP codes in the Philippines is not mandatory, however it is highly recommended by Philpost that they be used.
 Also, unlike American ZIP codes, the Philippine code is a four-digit number representing two things: in Metro Manila, a barangay within a city or city district (as in the case for Manila), and outside Metro Manila, a town or city.
 Usually, more than one code is issued for areas within Metro Manila, and provincial areas are issued one code for every town and city, with some rare exceptions such as Dasmariñas, which has three ZIP codes (4114, 4115, and 4126) and Los Baños, which has two ZIP codes (4030 and 4031 for the University of the Philippines Los Baños).
The Palarong Pambansa (Filipino for "National Games") is an annual multi-sport event involving student-athletes from 18 regions of the Philippines.
 The event, started in 1948, is organized and governed by the Department of Education or DepEd.
Cebu Business Park is a 50-hectare masterplanned development in Cebu City, Cebu, Philippines.
 Cebu Holdings, an affiliate of Ayala Land, is currently responsible for the development of Cebu Business Park.
 Prior to the development of the Iloilo Business Park, it is the single largest urban development project in the Philippines outside of Metro Manila.
 Integrating business, residential, sports, recreation and leisure facilities, the centerpiece of the business park is the 9-hectare Ayala Center Cebu shopping mall, which draws 60,000 shoppers daily.
The Manila Light Rail Transit System (Filipino: "Sistema ng Magaang Riles Panlulan ng Maynila" ) popularly and informally known as the LRT is a metropolitan rail system serving the Metro Manila area in the Philippines.
 Although referred to as a light rail system because it originally used light rail vehicles, it has characteristics that make it more akin to a rapid transit (metro) system, such as high passenger throughput, exclusive right-of-way and later use of full metro rolling stock.
 The system is operated by the Light Rail Transit Authority (LRTA), a government-owned and controlled corporation under the authority of the Department of Transportation and Communications (DOTC).
 Along with the Manila Metro Rail Transit System (MRT-3, also called the new Yellow Line), and Philippine National Railways's commuter line, the system makes up Metro Manila's rail infrastructure.