A reliable source, announced that November 7, 2011 (Monday) is declared as regular holiday in observance of Eidul Adha , also read a tweet from @ANCALERTS. Will update with the official post from the government website. Keep Posted.
Update:Official Declaration from the Government Website
PROCLAMATION NO. 276
DECLARING MONDAY, 7 NOVEMBER 2011, AS A REGULAR HOLIDAY THROUGHOUT THE COUNTRY, IN OBSERVANCE OF EIDUL ADHA (FEAST OF SACRIFICE) the National Commission on Muslim Filipinos (NCMF) recommended that the observance of Eidul Adha be on 7 November 2011 and the Eidul Adha prayer held on 6 November 2011;
Source: gov.phMore Info:
“Festival of Sacrifice” or “Greater Eid” is an important religious holiday celebrated by Muslims worldwide to commemorate the willingness of Abraham (Ibrahim) to sacrifice his son Ishmael (Isma’il) as an act of obedience to God, before God intervened to provide him with a ram to sacrifice instead. The meat is divided into three parts. The family retains one third of the share; another third is given to relatives, friends and neighbors; and the other third is given to the poor and needy. Source: Wiki