Title: Flag of the Philippines
Content:  The national flag of the Philippines is a horizontal bicolor flag with equal bands of royal blue and crimson red, with a white, equilateral triangle at the hoist. In the center of the triangle is a golden-yellow sun with eight primary rays, each representing a province. At each vertex of the triangle is a five-pointed, golden-yellow star, each of which representing one of the country's three main island groups—Luzon, the Visayas (though originally referring to the island of Panay) and Mindanao. The white triangle at the flag represents liberty, equality, and fraternity. A unique feature of this flag is its usage to indicate a state of war if it is displayed with the red side on top, which is effectively achieved by flipping the flag upside-down.
Title: Flag of the Philippines
Content:   In the 1850s, both Manila and Iloilo, the islands' largest ports, had maritime flags used for navigation in Philippine seas. Both maritime flags were swallowtail flags with blue and red stripes, which are now both part of the Philippine flag. The Philippine national flag has a rectangular design that consists of a white equilateral triangle, symbolizing liberty, equality and fraternity; a horizontal blue stripe for peace, truth, and justice; and a horizontal red stripe for patriotism and valor. In the center of the white triangle is an eight-rayed golden sun symbolizing unity, freedom, people's democracy, and sovereignty. Each ray represents a province with significant involvement in the 1896 
Title: Armed Forces of the Philippines Medal of Valor
Content:  The sea-lion represents the Office of the President of the Philippines. The eight-rayed sun represents the eight Philippine provinces that revolted against Spain. The blue ripples represent the Armed Forces of the Philippines. The crossed swords represent conflict with the enemy in defense of the nation; the three stars represent Luzon, Visayas and Mindanao, the three island groups of the Philippines, while the sampaguita wreath symbolizes the highest honor for courage and gallantry. The red coloration signifies bravery.
Title: Flag of the Philippines
Content:  Revolution against Spain; these provinces are Manila, Bulacan, Cavite, Pampanga, Morong (modern-day province of Rizal), Laguna, Batangas, and Nueva Ecija (some sources specify other provinces as alternatives to some of these ). However, according to the Declaration of Independence and a research by Ateneo de Manila University Professor Ambeth Ocampo, the rays of the sun symbolized the first eight provinces of the Philippines which was declared under martial law during the Philippine Revolution (Batangas, Bulacan, Cavite, Manila, Laguna, Nueva Ecija, Pampanga and Tarlac). Three five-pointed stars, one at each of the triangle's points, stand for the three major island groups: Luzon, Visayas (originally referring to Panay Island) and 
Title: Battle of San Juan del Monte
Content:  The present-day design of the Philippine flag features the eight-ray sun, which, some of the provinces that Blanco took under martial law on August 30, 1896 took a representation. The eight rays of the sun represent the eight provinces that initiated revolution against Spain: Manila, Cavite, Bulacan, Pampanga, Nueva Ecija, Bataan, Laguna and Batangas, though historian Ambeth Ocampo listed Tarlac instead of Bataan. On July 25, 1987, former President Corazon C. Aquino signed Executive Order 292 which declared the last Sunday of August each year as a public holiday in the Philippines. This commemorates the Cry of Pugad Lawin and the start of the Philippine Revolution. In 1974, the Pinaglabanan Shrine was unveiled in San Juan, along Pinaglabanan Street. "Pinaglabanan" is a Tagalog word for "fought over". The present-day San Juan Elementary School stands on the former grounds of the ruined El Polvorín. In 2006, a museum for the Katipunan was opened by the San Juan city government located by the shrine.
Title: Flag of the Philippines
Content:  In December 1987, congressman Alawadin Bandon Jr. of Tawi-Tawi proposed the addition of a ninth ray to the Philippine flag's sun to represent "Muslim participation" in the Philippine Revolution, arguing that "As a Muslim I am assaulted by a feeling of alienation in being excluded from the symbolic narration of the great history of the country." , there is a proposal to add a ninth ray to represent the Moro people (Filipino Muslims), as well as other indigenous groups. Senator Richard Gordon filed Senate Bill No. 2590 which aimed to amend Flag and Heraldic Code of the Philippines in 2008. This measure was later substituted by Senate Bill No. 3307 which 
Title: Flag of the Philippines
Content:  symbolized blood, as members of the Katipunan signed their membership papers in their own blood. The various leaders of the Katipunan, such as Andrés Bonifacio, Mariano Llanera, and Pío del Pilar, also had individual war standards. The organization was represented in Cavite province by two factions: the Magdiwang faction and the Magdalo faction, with each adopting a flag. Both used a white sun. Instead of the letter K the flags bore the symbol for the syllable ka in Baybayin, the pre-Hispanic writing script of the Filipinos. The Katipunan adopted a new flag in 1897 during an assembly at Naic, Cavite. This new flag was red and depicted a white sun with a face. The sun had eight rays, representing eight provinces of the Philippines.
Title: Sun of May
Content:  In the flag of Argentina, the Sun of May is the radiant golden yellow sun bearing the human face and thirty-two rays that alternate between sixteen straight and sixteen wavy. In the flag of Uruguay, the Sun of May is the golden yellow sun bearing the human face and sixteen triangular rays that alternate between eight straight and eight wavy. Inspired by the Latin American wars of independence, the Philippines which was a fellow former Spanish colony also adopted the Sun of May as a revolutionary banner. The Sun of May is found on the official logo of the Cypriot House 
Title: Coat of arms of the Philippines
Content:  The coat of arms of the Philippines (Escudo de Filipinas) features the eight-rayed sun of the Philippines with each ray representing the eight provinces (Batangas, Bulacan, Cavite, Manila, Laguna, Nueva Ecija, Pampanga, and Tarlac) which were placed under martial law by Governor-General Ramón Blanco during the Philippine Revolution, and the three five-pointed stars representing the three major island groups of Luzon, the Visayas, and Mindanao. On the blue field on the dexter side is the North American bald eagle of the United States, and on the red field on the sinister side is the lion rampant of the coat of arms of the Kingdom of León of Spain, both representing the country's colonial past. The current arms, which shares many features of the national flag, was designed by Filipino artist and heraldist Captain Galo B. Ocampo.
Title: Coat of arms of the Philippines
Content:  During the Second Philippine Republic, a more nationalistic policy were adopted and the seal was revised. Foreign components of the Filipino heraldic symbol which previously represented its colonial links to Spain and United States were removed. Instead, salient features of the flag and seal of the short-lived Philippine Republic were incorporated, consisting of the eight-ray mythological sun and three stars located beneath the equilateral triangle. Written within three sets of two marginal lines of the three sides of the triangle were Kalayaan, Kapayapaan, Katarungan (Liberty, Peace, Justice). Around the seal was a double marginal circle within which was written Republika ng Pilipinas (Republic of the Philippines).

Question: what does the sun in the philippine flag represent?
Answer: Province of the Philippines.