This is really frustrating, my parents come to visit me on March 6 and they showed their return flight tickets to the POE officer which is on September 4 assuming the standard I-94 stay is 6 month. But the Officer put September 3 on the I-94 card. Would it be ok to overstay for just one day or do we have to spend hundreds to change the return flights? Will a one-day overstay affect future visa application? Need your suggestion please! And do you know if there is a way to go back to the airport to request a change? Thanks.