What trip are you making?

From where to where?

What kind of ticket have you bought?

If you're taking a domestic journey, there's no such concept - your ticket is valid the entire day. Check for validity during peak hours (06:30 - 09:00 and 16:00 - 18:30). 

There is no rush hour on Saturday. Tickets for domestic trains are valid between 00:00 and 04:00 the next day (all times of Saturday).

For international trains you must contact customer service.

Ticket for Saturday, you may only travel on Saturday. If necessary, contact customer service by telephone or chat. Usually purchased tickets are final.