Buddhist philosophy and "events"

By "event" I mean something that happens over some interval of time. Am I right that for Buddhists, intervals don't exist (everything lasts only for an instant): so neither do events? If so may I ask about the experience of "now" or the present: i.e. the experience of impermanence? Is the experience of impermanence an event (i.e. with duration) or is it too only an instant?