Does United have 24 hours to change a flight?

As a reminder, Basic Economy tickets are non-refundable and non-changeable in most cases, but may be canceled for a partial eCredit.

https://community.servicetitan.com/t5/General-Office/lt-lt-1-888-829-1467-gt-gt-Does-United-have-24-hours-to-change-a/m-p/57441#M4362

Does United have 24 hours to change a flight?