Using the Copy Single or Copy Recurring Mode in the Add/Edit/Archive Page, you can copy the information from an existing event to a new event, which can then be edited to meet your specific needs.
To copy the data from an event, just click Copy Single or Copy Recurring (depending on the type of event you chose). Note the circled areas in the photo below.
Both Copy Single and Copy Recurring follow the same process as the Add an Event mode. The only difference is that the information from the original event is preloaded. All you need to do is edit the information you want to change (date, time, location, ect).
Note that Copy Single and Copy Recurring also provide Administrative Information that is not available in Add an Event mode. This provides you information as to when the original event was created and last modified.