I have only knowledge about MNIT Allahabad and IT Surathkal as I have a few friends there.
MNNIT Allahabad
In all, the first and the last year at MNIT Allahabad are relatively free so you can enjoy your life to the fullest.
NIT Surathkal:
Hope this helped you!
At NITK Surathkal, Saturdays are holidays for all the students. In the first year, timings depend upon your section. It has about 23 hours of classes every week.
These can be:
The schedule can be altered as per the student’s convenience with the help of the class representatives (CRs). In the second year onwards, the schedule depends on the branch in which you belong. For example, the mining branch has 20 hours per week, CSE and ECE have 25-28 hours per week, while the mechanical department has around 35 hours per week. There are extra classes at the end of the trimester.
At NITK Trichy the college time is usually 8:30 AM - 3:10 PM. Sometimes, it may extend to 4-5 PM. There is a lunch break from 12:10 – 1:30 PM.
At MNNIT Allahabad the classes are held from Monday to Friday. Saturday and Sunday are holidays. In the first year, all students study general subjects from 9 AM – 5 PM. The lectures are 30 hours a week. In the second and the third year for the core subjects, the classes are 8 AM – 6 PM, i.e., 40 hours a week. The CSE/IT batch has only 25-30 hours per week. In the last year, classes are rarely held in the institute. The lectures are approximately 12-15 hours a week.