Spiritual leader Dada J P Vaswani, head of the Sadhu Vaswani Mission, passed away in Pune on Thursday, one month before his 100th birthday, due to old age-related ailments, a mission member said.

"He had been admitted to a private hospital in the city for the past few days and was discharged last night," she said. He died in the mission premises this morning, she added. The mission was planning a grand celebration on his 100th birthday next month, she said. Vaswani, 99, an acclaimed orator, author, spiritual leader, and philosopher, had millions of followers across the world. Prime minister Narenda Modi had addressed his 99th birthday through video link.