All Saint's Day in the Philippines is celebrated on November 1st and sometimes the 2nd annually celebrating all the Christian saints and in particular all the saints that do not have a special holiday named after them.
Celebration\ Observance
People will honor the saints by attending church and pray. Some will bring flowers to the graves of their dead relatives or light candles on top of the graves.
History
The Spanish back in the 1600's brought to the Philippines the Catholic religion and over time this has become the dominant religion.