The Bastille is a medieval fortress used as a prison by French kings. On 14 July 1789, troops stormed the Bastille and ended its reign over France. The move is seen as the beginning of the French revolution. Since that day, 14 July has been celebrated in France and in French communities all over the world. In South Africa, the day is celebrated by the community of Franschoek. Activities include indulging in fine cuisine and French wine and dressing up in French gear.
References

Lawless L.K Bastille Day The French national holiday celebrates the beginning of the French Revolutionfrom About.com [online] Available at: http://french.about.com[Accessed on 4 July 2012]|Time and date Bastille Day in France[online] Available at: http://www.timeanddate.com[Accessed on 4 July 2012]