Here's how to transfer event ownership to another person
Note: The recipient must already be on the event as a collaborator with full access. If they are not, please follow this guide to invite them as a collaborator, then return here once that’s completed.
Steps
From the host account, go to the main event view - where you'll see your event analytics. If you're in a gallery/album (viewing photos & videos), click the back arrow next to the gallery name to exit into the main event view.
Click the Menu button at the top right (purple circle with 3 white lines) to open the "Event Menu"
Select "Collaborators" from the menu list
Hover over the name of the collaborator you want to transfer the event to, and click the middle button (box with arrow inside). If you're on mobile/touch device, tap the name to show the buttons.
You can either choose to "Remain as a collaborator" or completely transfer & exit event, and then hit, "Yes, Continue"