One of my friends is an alumnus of IIT Madras and here is his experience on the first day at the institute.
It was back in 2016. My friend was so excited that he reached the college two days before the assigned date. He missed the introduction part on the website of IIT M. On reaching the campus the security at the gate asked him to go to CCW which handles the hostel accommodation. As the undergraduates are supposed to come after two days. He didn’t get his accommodation that day.
He roamed around the campus with his parents and got to meet some students who came for master’s admission. They also got a place to stay for two days. Overall, it was a good experience for him.