Hope it is not to late to wish all Muslims Eid Mubarak. In Malay it is called Hari Raya Aidil Adha, Hari Raya Haji or Hari Raya Qurban. The name of Hari Raya Haji is given in conjunction with the Pilgrimage season and for the meaning of Hari Raya Qurban, kindly read the following text taken from the Human Appeal Australia Website.
Qurban
The word udhiyah means an animal of the ‘an’aam class (i.e., camel, cow, sheep or goat) that is slaughtered during the days of Eid al-Adha because of the Eid and as an act of worship, intending to draw closer to Allaah thereby.
This is one of the rituals of Islam prescribed in the Book of Allaah and the Sunnah of His Messenger (peace and blessings of Allaah be upon him), and according to the consensus of the Muslims.
Allaah says (interpretation of the meaning): “Therefore turn in prayer to your Lord and sacrifice (to Him only)” [al-Kawthar 108:2]
It was narrated in Saheeh al-Bukhaari (5558) and Saheeh Muslim (1966) that Anas ibn Maalik (may Allaah be pleased with him) said: “The Prophet (peace and blessings of Allaah be upon him) sacrificed two white rams speckled with black. He slaughtered them with his own hand, said ‘Allaahu akbar’ and put his foot on their necks.”
It was narrated from al-Baraa’ ibn ‘Aazib (may Allaah be pleased with him) that the Prophet (peace and blessings of Allaah be upon him) said: “Whoever offers a sacrifice after the prayer has completed his rituals (of Eid) and has followed the way of the Muslims.” Narrated by al-Bukhaari, 5545.
The Prophet (peace and blessings of Allaah be upon him) offered sacrifices, as did his companions (may Allaah be pleased with them).