Chandrayaan I stopped sending radio signals at 20:00 UTC on 28 August 2009.It operated for how many days in lunar orbit ?(Although it was designed and supposed to work for 2 Years.)

Chandrayaan-1 was launched on October 22, 2008, and stopped sending radio signals on August 28, 2009. From launch date to loss of contact: Oct 2008 (remaining days: ~10) + Nov 2008 (30) + Dec 2008 (31) + Jan 2009 (31) + Feb 2009 (28) + Mar 2009 (31) + Apr 2009 (30) + May 2009 (31) + Jun 2009 (30) + Jul 2009 (31) + Aug 2009 (28 days) = approximately 312 days total in lunar orbit. The mission was designed for 2 years but operated for 312 days before contact was lost.