It depends on the language and region:
Tagalog (the national language):
* "Magandang araw po" (Formal, literally "Good day")
* "Magandang hapon po" (Formal, literally "Good afternoon")
* "Magandang gabi po" (Formal, literally "Good evening")
* "Kumusta ka?" (Informal, "How are you?")
* "Hello" (English, widely used)
Other languages:
* "Kumusta" (Cebuano, Bisaya, and other Visayan languages)
* "Mabuhay" (Ilocano, "Welcome")
* "Kamusta" (Kapampangan)
* "Araw" (Pangasinan, "Day")
The most common and widely understood way to say hello in the Philippines is "Magandang araw po" or "Hello".