Can I prepone or postpone my reservation?

The date of journey on Confirmed/RAC/Waitlisted tickets can be preponed or postponed in the same/higher class or for a longer distance on payment of nominal charges. This facility can be availed only once, irrespective of whether
the accommodation available is reserved or RAC or wait-listed. If you want to prepone the date of your journey, you should surrender your ticket during working hours and up to six hours before the schedule departure of the train in
which fresh reservation is required. For postponement, the ticket must be surrendered at least 24 hours before the schedule departure of the train in which reservation is presently held. Such changes can be made only once.