Karwa chauth or Karva Chauth is on Nov 2, 2012. It is on 10th days after Dusshera and Diwali is on 20th day ..
This is women festival but bring whole family together especially husband, wife, mother in law. Wife fast for their husband and give gift to mother in -law.
There is a tradition of Puja, fast. Women doing fast eat early in morning and then only after moon appears in night. The most difficult part is - even water is not taken during the day.