Yeah, where I'm from, since historic has the emphasis on STOR and not HI (as in history), the h is much softer, so it's pretty normal to say "an historic event"

Yeah, where I'm from, since historic has the emphasis on STOR and not HI (as in history), the h is much softer, so it's pretty normal to say "an historic event" but also "a history of the world". It's silly to act like there's a right or wrong. Dialects and accents are a special thing. Just be consistent.