Conversation so far:
What did Sanjay Dutt do in 2007?
Sanjay Dutt was sentenced to six years' rigorous imprisonment under Arms act for illegal possession of weapons.
What weapons was Sanjay Dutt in possession of when he was sentenced to six years' rigorous imprisonment?
Sanjay Dutt was arrested for illegal possession of arms and ammunition like 9mm pistol and an AK-56 assault rifle, which were used in 1993 Bombay Terror Attacks.
Where did Sanjay Dutt serve his prison sentence for illegal possession of weapons?
Sanjay Dutt was returned to jail at Arthur Road and soon after moved to the Yerawada Central Jail in Pune.

Question: When was he released from jail?
Self-contained rewrite: When was Sanjay Dutt released from jail for illegal posession of weapons?