Can I cancel my United flight without penalty

[olismith]

https://experience.dynamics.com/ideas/idea/?ideaid=edf552b2-a839-ef...
How many days before a United flight can you change the date 888*829*1467 ?

When you book your domestic flight ticket with United Airlines and want to change its travel date and time, you must initiate this process within 24 hours of the booking. But if you fly on an international flight, you change your flight date within seven days before departure