How do you say time passes quickly?
time ˈflies (saying) time seems to pass very quickly: How time flies! I’ve got to go now. ♢ Time has flown since I started working here. This is a translation of the Latin phrase ‘tempus fugit’.
Time does fly is correct grammar, but the common saying is simply: Time flies! ‘(How) time flies (by)! ‘ is a very common idiom and the expression ‘time goes by so/too fast’ is another way of saying it.