The rules this calculator applies
Indian Railways reservations open a fixed number of days before the journey, called the Advance Reservation Period (ARP). The calculator applies the rules in force since 1 November 2024:
- General booking: opens 60 days before the journey date, counted excluding the journey date itself, at 08:00 IST.
- Tatkal: opens one day before the journey date — at 10:00 IST for AC classes (2A, 3A, CC, EC, 3E) and 11:00 IST for non-AC classes (SL, FC, 2S).
- All times are IST (UTC+05:30) — the clock IRCTC booking runs on — regardless of your device timezone.
Worked example: for a journey on 10 November 2026, count back 60 days excluding the journey date — general booking opens on 11 September 2026 at 08:00 IST. Tatkal for the same train opens on 9 November 2026, at 10:00 IST for AC classes and 11:00 IST for non-AC.
120 days or 60 days? Why the internet disagrees
For years the ARP was 120 days, and a large share of articles, forum answers and videos still say so. It changed: with effect from 1 November 2024 the window is 60 days, excluding the journey date. Tickets that had already been booked under the old 120-day window before that date remained valid. If a page tells you 120 days, it predates the change — the 60-day figure is the one IRCTC applies today, and it is what this calculator uses.
Exceptions to the 60-day window
A few categories do not follow the standard window, and this calculator deliberately does not guess at them:
- Certain day-time intercity and short-distance express trains have shorter advance-booking limits of their own (some open only a few days ahead). Those train-specific limits continue unchanged.
- The foreign-tourist quota can be booked much earlier — up to 365 days in advance.
- Special and festival trains are notified with their own booking windows when they are announced.
If your train is a short-distance daytime service, check its booking window on IRCTC before relying on the 60-day date.
Booking day tips
On popular routes, seats in the general quota can sell out within minutes of the window opening — being logged in to IRCTC with passenger details saved before 08:00 IST makes a real difference. If the window has already passed, Tatkal the day before travel and the current-booking window after chart preparation are the remaining options; both are first-come, first-served.
A note on accuracy: the date arithmetic on this page is exact for the rules stated above (60-day ARP, 08:00 IST opening, Tatkal at 10:00/11:00 IST). Railway booking policy does get revised from time to time — IRCTC and Indian Railways announcements are the authoritative source for the rule in force on any given day.