When Amitabh Bachchan goes to Police Inspector Anwar's house for a party, the calendar in his house shows the date January 12. Later when Munshiji is in hospital on his death bed, the calendar shows December 1983. It is impossible that it has been almost a year since the two scenes are supposed be just days apart.
The young boy who is given money by Vicky in the bar after the fight scene has never seen Munshiji. Yet when Munshiji is injured on the road he recognizes him immediately.