Log in to groupvalet.com. Then, from the GroupValet Dashboard, find the activity and click "Manage This Activity" (or "Manage This Event" for a community event). You'll find these on the activity's card, under "For Managers Only". Next, click "Edit/Cancel this activity" (or "Edit/Cancel this event").
If the activity repeats, you'll then be able to edit just that one date or the entire series. If it has only a single date, you'll simply get an Edit button for it.
If you don't see the activity on your Dashboard, you can also get there from the left sidebar: under "Managers Only", open "Activities" and click "Manage Activities" (for a community event, open "Events" and click "Manage Events"), then choose the activity and click "Next".
Note - this can only be done via our website at groupvalet.com and not in our app.