Reserve Bank of India Meetings Calendar for 2015

           Date                                   Day         Time                   Event                            Actual    Previous
28th January 2015        Wednesday     11:00 A.M RBI Interest Rate Decision 7.75% 8%
3rd February 2015        Tuesday        11:00 A.M RBI Interest Rate Decision                      7.75%
1st April 2015              Wednesday    12:00 P.M RBI Interest Rate Decision
3rd June 2015              Wednesday    12:00 P.M   RBI Interest Rate Decision
5th August 2015          Wednesday    12:00 P.M RBI Interest Rate Decision
30th September 2015  Wednesday    12:00 P.M RBI Interest Rate Decision

Source: http://www.tradingeconomics.com/india/calendar#  

In India, interest rate decisions are taken by the Reserve Bank of India's Central Board of Directors. The official interest rate is the benchmark repurchase rate.