I don't ask him what time he'll be home..he usually just says..I don't put much credit in it cause he usually changes his story part way through the day... son doesn't fully understand time yet (he's 4) but does know that it gets dark and when it gets dark and daddy said he'd be home after lunch...you've already eaten dinner and now it's getting dark and daddy still isn't home, what mommy says doesn't mean anything.