We recommend using a large screen when editing events rather than a cellphone or tablet.
Once logged in use the Edit button in an event page as below.
Note you can also Publish and Unpublish events by using the corresponding buttons
The Manage Events link can be found on the menu below Members and you will be presented with a list of your events. To edit an event select it by clicking the checkbox and then click the Edit button.
Note you can also Publish and Unpublish events by selecting via the check boxes and using the corresponding buttons.