May in the Philippines often includes local cultural celebrations, religious observances, and the lead-up to peak domestic travel periods. Notable May activities include Flores de Mayo (a month-long Marian devotional with local events), Labor Day remembrances in early May, and various city fiestas across Luzon and the Visayas that can increase domestic travel demand. These events can affect hotel availability in Manila, Cebu, and Palawan—book accommodations early if your May itinerary includes festival dates. Keep an eye on local event calendars for Makati, Quezon City, and Pasay around major city celebrations to avoid sold-out dates after arriving at NAIA.