You can edit most of your event details even after it has been published.
What you can change
Event description and images
Ticket prices, quantities, and visibility
Add ons and ticket types
Location and time (with extra care if attendees are already buying)
If you change something important
If you update the time, address, or anything that affects what attendees expect, send them an email campaign right after so they have the latest info. The Marketing Dashboard makes this quick.
Where to find it
Open the event from your dashboard and tap edit. Save when you are done and changes go live right away.