On the Events tab (or from the Home page if this event is in your list of upcoming events on that page), click the name of the event you want to edit. The Basic tab for the event is displayed. Note that you can also click the Actions menu associated with this event, and select Edit Event to end up in the same place.
Basic tab for an event
Make your desired changes. If you're editing the recurrence pattern, see Recurring Event Setup.
Click Save Changes.
Note: Only the event's basic properties are updated. No changes are made to the agenda or information on other tabs.
If this is a recurring event, the following message displays:
Updating event confirmation
Click Update only this occurrence or Update the series. If you click Update only this occurrence, you'll see this message under the Recurrence field: