The Advance Reservation Period — ARP for short — is the technical term behind the "60-day rule" you'll see mentioned everywhere on this site. It's worth understanding properly, because it's changed before, and the way it's counted trips up more people than any other part of the booking process.
What the ARP actually is
The ARP is the maximum number of days before a journey that Indian Railways allows a passenger to book a confirmed or waitlisted ticket under the General quota. It's set centrally by Indian Railways and applies nationwide, across nearly all mail, express, and superfast trains.
Right now, that number is 60 days. It's a single rule, but it interacts with everything else covered on this site — your booking date, your countdown, your calendar — all of it is really just downstream of this one number.
A brief history: from 120 days to 60
The ARP wasn't always 60 days. For a long stretch, Indian Railways allowed booking up to 120 days in advance. That changed a few years back, when the window was shortened to 60 days.
Why the change happened
A large portion of tickets booked far in advance — sometimes months out — were never actually used, either cancelled or simply left to expire as waiting list tickets. Shortening the ARP was, in part, an attempt to reduce this kind of speculative or exploratory booking and free up inventory for people with firmer travel plans.
This history matters for one practical reason: the ARP has changed before, and there's no guarantee it stays at 60 days forever. If you've read an older article or forum post mentioning 120 days, that's outdated information reflecting the previous rule.
How the 60 days are actually counted
The journey date itself counts as one of the 60 days — this is the detail that causes almost every manual counting mistake. It's not "60 days before" in a casual subtraction sense; it's an inclusive count where your travel day is day 60 of the window.
Journey date: 3 December 2026
Booking opens: exactly 60 days earlier — 4 October 2026, at 8:00 AM IST.
For the full breakdown of the counting method, including a manual shortcut using weeks, see our calculation guide.
Does the ARP apply to every booking type?
No — and this is the second most common point of confusion. The 60-day ARP specifically governs General quota bookings. It does not apply to:
- Tatkal — opens one day before travel, a completely separate rule.
- Premium Tatkal — same one-day-ahead timing as Tatkal.
- Certain special or festival trains — which can occasionally follow their own timeline.
Could the ARP change again?
There's no way to predict railway policy with certainty, but given that it's already changed once, it would be unwise to assume 60 days is permanent. This is exactly why this site is built around a live calculator rather than a fixed reference table — if the rule changes, the calculation logic can be updated in one place rather than leaving outdated information scattered across old articles.
Always double-check for rule changes on high-stakes trips
If you're planning a significant trip — a wedding, a festival journey, anything booked far in advance — it's worth a quick check on official IRCTC channels closer to your booking date, just in case the rule has shifted since you last checked.
Mistakes related to the ARP
- Referencing outdated 120-day information from an old article or forum post.
- Applying the 60-day rule to Tatkal bookings, where it doesn't apply.
- Miscounting the 60 days due to the inclusive counting method.
- Assuming the rule can never change again.
Quick summary
- Booking opens 60 days before your journey date under the General quota, at 8:00 AM.
- Tatkal and Premium Tatkal open one day before travel, with separate timings for AC and Non-AC classes.
- Rules can change — always confirm close to your travel date on the official IRCTC platform.
Frequently Asked Questions
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