Amending the details of your group is easy but can only be done by the Group Admin. If you're the Group admin, navigate to:
1. The Meditate tab and select the event.
2. Tap the 3 dots at the top right corner of the page.
3. Select Edit Event.
To change the time or track, navigate to the Meditate tab and select the event, followed by tapping the pencil icon on the meditation track.