There's a discussion of dated events at https://www.reddit.com/r/AskHistorians/comments/19pgf6/what_is_the_earliest_recorded_date_that_we_can/. I was taught at school that Egypt's unification around the 32nd century BCE was the first specifically recorded "event", though the precise date is unknown. I'm not sure if we've found earlier ones in the interim - shameful, I admit!