A sentencing date of April 16 has been set for convicted Nxivm mastermind Keith Raniere, who is facing a sentence ranging from 15 years to life in prison, a federal judge ruled on Friday.

Raniere, the 59-year-old leader of the upstate cult-like organization that played host to a violent sex-slave ring, is being sentenced for his June 2019 conviction on a raft of charges that include racketeering, forced labor and sex trafficking.

Raniere’s sentencing, originally planned for September, has been a moving target as federal probation authorities have labored to finish their recommendation for the Nxivm honcho’s punishment.

Brooklyn Federal Court Judge Nicholas Garaufis, who presides over the case against Raniere and several of Nxivm’s leading adherents, has also set an April 23 sentencing date for Seagram booze heiress Clare Bronfman — who used a large chunk of her family’s fortune to bankroll the purported self-help group.

Garaufis’ order comes just days after a group of more than former 80 Nxivm followers filed a lawsuit against Raniere, Bronfman and other members of the group’s “inner circle” with claims that they were tricked into forking over large sums of money for phony personal-improvement schemes and dubious medical experiments.

Female members said they were lured into joining “DOS,” a sex-slave ring within Nxvim where women were forced to have sex with Raniere and were branded with his initials.

The lawsuit also targets other members of the Nxivm brass who pleaded guilty to federal charges.

They include Sara Bronfman, Clare’s sister; Nancy Salzman and her daughter Lauren Salzman; TV actress Allison Mack and Kathy Russell, who served as the group’s bookkeeper. They are all also awaiting sentencing.