Metropolitan Magistrate Namrita Aggarwal, who conducted the proceedings in-camera, extended the date after counsel for the five accused said several documents in the charge sheet are incomplete and illegible, defence lawyers M L Sharma, V K Anand, Vivek Sharma and A P Singh told reporters.
The court had earlier fixed it for today for completion of the scrutiny of the documents.
The five accused -- bus driver Ram Singh, his brother Mukesh, Vinay Sharma, Pawan Gupta and Akshay Singh -- were produced before the court in muffled faces.
The case of the sixth accused - a minor - is being heard by a Juvenile Justice Board.
The victim, a paramedical student, was brutally raped and assaulted in a moving bus here on the night of December 16, 2012 and she died of injuries on December 29 in a Singapore hospital.