Dear Deep,
JEE main 2020 had released the examination dates.
The examination will take place from 6th Jan 2020 to 9th Jan 2020.
And on 31st Jan 2020 results will be out.
The duration of the examination is 3 hours.
So far there's nothing mentioned about change in the dates so you can expect same date for examination.

I hope this information helps you

All the best

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