Lawyers for the comedian, who turns 81 in July and faces the prospect of the rest of his life in prison, had asked Judge Steven O'Neill to delay sentencing until the end of the year.
Cosby's convictions on three counts of aggravated indecent assault will likely be combined into one charge that carries a standard sentence of five to 10 years in prison.
Cosby's spokesman did not immediately respond to a message left seeking comment.
The man once revered as America's Dad has been a prisoner in his suburban Philadelphia mansion since his April 26 conviction and he hasn't been heard from since lashing out at a prosecutor in court that day.
Even then, Cosby can go out only to visit his lawyers or the doctor.
Before sentencing, Cosby must undergo an assessment to determine if he is a sexually violent predator. Because of his conviction, he will also be required to register as a sex offender under Megan's Law.
Constand, a former Temple University women's basketball administrator, is expected to speak at sentencing. O'Neill said in a court order the hearing could take two days.
Constand testified at Cosby's trial that the comedian knocked her out with three blue pills he called "your friends" and then penetrated her with his fingers as she lay immobilised, unable to resist or say no.
Cosby claimed the encounter was consensual, saying he gave her the cold and allergy medicine Benadryl to relax. His lawyers have vowed to appeal, but that can't happen until Cosby is sentenced.
In Pennsylvania, defendants are typically sentenced within 90 days of a conviction. O'Neill initially said he would schedule Cosby's sentencing for July. His court order did not explain why he moved it to September.
Constand's testimony and that of five other accusers allowed prosecutors to uncloak Cosby who solidified his reputation as a family man by playing Dr. Cliff Huxtable on "The Cosby Show" as a manipulative predator who used his built-in trust to trick women into taking powerful intoxicants so he could violate them.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)