Visit http://www.turismojerez.com/ to find a full list of festivals and events. If you're planning a visit, it's good idea to check the following major events: 

Feria del Caballo (early May)
A week long celebration, dominated by horses, fino and the major element of jerezano culture - the social gathering. 

Sanlucar Manzanilla Fair (May)
A celebration of Manzanilla - a Sherry only produced in Sanl�car de Barradmeda. 

La Vendemia (September)
The grape harvest festival is one of the most important in the calendar and its cultural programme of events lasts throughout September.