I booked a flight online and then immediately realized that the wrong date had gone through. Within seconds I was on the phone to Jetstar to rectify the mistake. I'm swearing black and blue that I entered the correct date and when I navigate back to the page the correct date is still there. Regardless, you would think that a grace period for mistakes would be reasonable and sensible. Um...no. $60 penalty and the privilege of being treated like a liar by a jerk. Never again, Jetstar.