Newly developed IRCTC next generation ticket booking site has more lightweight methods. So it is always fast even in peak traffic hours also. Advance booking for irctc train ticket booking opens before 60 days of the travel. And it will open on 8am every day.
During festival days, traffic will be more and all tickets booked within 5 mins. Because new ticket booking system is too fast and reliable. So now booking in IRCTC is more easier. If you miss the timing or if you are late by 5 mins you cannot book tickets, all tickets will be booked.
So to book ticket in advance booking, you should have all details with you. And you should be logged in before 5 mins. Search the trains you want and select berth. Click on refresh link on availability section. Sharply 8oclock ticket will be available to book. And provide the necessary details. You can book easily within a minute.
IRCTC tatkal ticket also a challenging one. Tatkal ticket booking opens on previous day of date of travelling. It opens sharply at 10am. Tatkal ticket booking fare is little bit higher than the ordinary one. If tatkal ticket is confirmed, you cannot cancel the ticket. And availability of the ticket is less compared to ordinary ticket booking.
You should be loggedin to the system before 9.55am. Search for the trains you want and select the berth type you want. Click the refresh link in the top of the availability section. On 10am you can see the Book Now link. Click that link and enter necessary details. And do the payment, your ticket will be confirmed.
Clear the cache of the browser and DO NOT use multiple logins in single system and dont use one username in multiple system. And keep your system time updated. Most of the users fail to set system time. So keep this on mind.
8am and 10am of every day is considered as peak hours in irctc. So always keep needed details with you to book tickets in irctc.