• 1 May: Labor Day.
• 6 May: Commemoration of the fall of Corregidor in 1942.
• 7-8 May: Sea Fair at Balangit (Bataan).
• 14-15 May: Carabao Festival at Pulilan (Bulacan), Angono (Rizal) and in Nueva Ecija. Water Buffalo Festival, with blessing of the buffaloes, races and other contests.
• 15 May: Harvest Festival (Pahiyas) in honour of San Isidro at Lucban and Sariraya (Quezon province).
• 17-19 May: Fertility rites at Obando (Bulacan), through which childless
couples hope to obtain a child.
• Throughout the month: Santacruzan (Processions in honour of the Virgin, particularly at Antipolo).