Dear Ranjeet, The Applications for admissions into Jawaharlal Nehru University  will be released tentatively in January 2019. You can fill the application form online at their official website. The entrance exam is conducted in May 2019 and the results will be declared by June 2019. For more information on exam.pattern, eligibility and admit card, please visit our page at: https://www.careers360.com/exams/jnu-entrance-exam

Regarding Jaipur National University, the admission process has already begun. You haven't mentioned the course that you want to pursue. However for Bachelors and Masters courses, you can apply until April 12th, 2019. Visit the official website for the online applications.