The JEE Main I, JEE Main II, CMAT and GPAT, NEET (UG), and UGC (NET) will be conducted by the NTA (National Test Agency). The dates have been announced by the human resources development ministry. 

The JEE Main 2019 will be first held in the month of January in 8 sittings from 6th till 20th January, 2019. The second JEE Main exam will be held in the month of April from 7th till 21st April, 2019. It will also be conducted in 8 sittings.

Joint Entrance Examination (JEE) MAIN will be conducted by the NTA from 2019 onwards. This Examination was being conducted by the Central Board of Secondary Education (CBSE) till 2018.

JEE Main 2019 is conducted for undergraduate engineering admissions into NITs, IIITs and GFTIs. The exam will be a Computer based test from 2019 and will be held twice a year in January and April.

JEE Main 2019 registrations for the exam to be held in January will start on September 1 and last date of online application form submission is September 30, 2018. JEE Main 2019 exam will be conducted from January 6 to 20, 2019.
While, Registrations for the April exam will commence from February 8 to March 7 and the exam will be conducted from April 6 to 20, 2019.

 https://engineering.careers360.com/articles/jee-main-important-dates

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