Sounds like a great time to me actually. I hate parties that run from say 2.30 or 3 to 4.30 - 5 because you feed your kids lunch before they go, then they are fed again at about 4 which is too early so they don't eat much, come home starving and want tea when they get back! Probably works well for those parents with little ones who need a nap beforehand as well, I remeber always having to drag ds2 out of his cot when little to drop ds1 to various parties.