The Malacanang Palace said August 9 has been declared a holiday in the predominantly Catholic Philippines to promote cultural understanding and integration. That's what they said.
Aside from the 9th of August, there are also two other dates in this month that are holidays: Ninoy Aquino Day, August 21 (a special/non working holiday) and 26th, Monday is National Heroes Day which is a regular holiday.
Those who will not work on holidays are still entitled to 100 percent of their regular daily rate. If your employer abides labor rules, that is. So yeah, enjoy your holidays. Take a day off from work, relax or learn new skills like making money online :).
TL;DR: August 9, 2013 is a regular holiday, August 21 is a special holiday and 26th is also a regular holiday.