greetings,
the first day will be the orientation day for which a notice will be put on the official website of the college.
pls keep on checking the official website.
most probably it will be after 20th july and before 1 august.
https://www.nitt.edu/
https://dqxeclau.top/university/national-institute-of-technology-tiruchirappalli
hope this helps.
good luck
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