Yes, but it’s better to reschedule than cancel if people have already bought tickets.
Reschedule a live stream
To reschedule, go to the live stream editor, pick a new date and time, and save. Bandcamp will email all ticket holders about the change.
Cancel a live stream
If you must cancel, you can do it from the last tab in the live stream editor. Remember, cancelling a show can disappoint fans, so try to reschedule when possible.