What colleges or university use trimester in the Philippines?

There isn't a widespread use of the trimester system in the Philippines in the way it might be in some other countries. The most common academic calendar is the semester system. While some smaller, private institutions *might* use a modified calendar that incorporates elements similar to a trimester system for specific programs or circumstances, it's not a common or standard practice among major universities. You'd have to check each university's individual academic calendar to determine their system.