It was already reported that IRCTC is going to make changes to Tatkal Quota. Now they announced the date from when it is going to come in.
"It has been decided that from June 15, timings for booking of Tatkal tickets will be staggered for AC and non-AC classes to 10 AM onwards and 11 AM onwards respectively," said a senior Railway Ministry official.
"The change has been effected to facilitate hassle-free booking by reducing the load on the server," he said.
Currently about 10,000 to 12,000 tickets are being booked online IRCTC ticketing site at peak hours. "Staggering the timing for AC and non-AC Tatkal tickets will help reducing load at windows and the ticketing sites," he added.