Ticket in Indian Railways
Indian railways have prescribed some new refund rules, which came into the effect from 1st of July, 2013.
PREPONEMENT and POSTPONEMENT of journey on reserved, WL or RAC tickets
It should be noted that PREPONEMENT or POSTPONEMENT of a journey on the Wait List or RAC or Confirmed tickets are permissible for the same or longer destination in same of higher class by same train. In fact you are eligible to make journey on the trains depart earlier or later on the same day or even few days ago or later. But you should surrender the tickets at least 48 hours before the scheduled time of departure of the train.