Yom Kippur is the Jewish day of repentance, considered to be one of the holiest and most solemn days of the year. Its central theme is atonement and reconciliation. Total abstention from food and drink usually begins half-an-hour before sundown and ends after nightfall the following day. Although the fast is required of all healthy adults, fasting is specifically forbidden for anyone who might be harmed by it. This year Yom Kippur was from sundown October 1 to nightfall October 2, 2006).  

 

Diwali (also called Deepavali) is a major festival/celebration known as the "Festival of Lights." It symbolises the victory of good over evil, and lamps are lit as a sign of celebration and hope for mankind. It usually occurs in October/November and this year is on October 21, 2006.  “Happy Diwali” is an appropriate greeting.

 

Eid ul-Fitr, often abbreviated as simply Eid, is an Islamic holiday that marks the end of Ramadan, the month of fasting. Fitr means "to break" and therefore symbolizes the breaking of the fasting period and of all sinful habits. Common greetings during this three-day festival are the Arabic greeting "Eid mubarak", or "Eid saeed" which, loosely translated, means "Happy Eid!" While the exact date is related to the moon, and therefore can vary by region, in this region Eid falls on October 23, 2006. 

 

Adapted from Wikipedia.