The five day festivity period called Diwali or Deepawali is a celebration for various reasons .
The Hindu festival of Raksha Bandhan signifies the bond between brothers and sisters. Miles apart at times, the Rakhee thread depicts the closeness and inseparable relationship of siblings.
The bond between a brother and sister can be very strong. In the event the continue to care for each other till their last days the separation can be devastating for the one who outlives the other.