Extending Your Stay
See Extend Your Stay on the U.S. Citizenship and Immigration Services (USCIS) website to learn about requesting and extension of your stay beyond the date indicated on your admission stamp or paper Form I-94, Arrival/Departure Record.
You must depart the United States on or before the date indicated on your admission stamp or paper Form I-94, unless your request to extend your stay is approved by USCIS.
Failure to depart the United States on time will result in you being out of status. Under U.S. law, visas of travelers who are out of status are automatically voided (section 222(g) of the Immigration and Nationality Act). If you had a multiple-entry visa and it was voided due to you being out of status, it will not be valid for future entries into the United States.