Yom Kippur Falls on 27/28 September 09

The day of Atonement is known to be the holiest day on the Jewish calendar, falling on the tenth of Tishri, it is a day marked by fasting and prayers
 
On the eve of 27 September 2009 and until after sunset on 28 September, Israel and world Jewry will observe Yom Kippur, or the Day of Atonement.
 
The day is known to be the holiest day on the Jewish calendar, falling on the tenth of Tishri, it is a day marked by fasting and prayers.
 
Yom Kippur is a complete Sabbath; no work can be performed on that day. It is a complete, 25-hour fast beginning before sunset on the evening before Yom Kippur and ending after nightfall on the day of Yom Kippur.
 
The day long fast is widely observed even among Israel's secular public and most of the country's Jewish population attend all or part of the day's synagogue services.