The timetable of the IIEST university has been modified and implemented since 2017. For the working days, i.e. Monday to Friday each week, the timing is as follows.
The rest of the day is yours after the classes finish at 16:35.
Only holidays allowed by the Central Government of India are considered, although during local Bengali festivities you can have holidays if the professors permit. A 4-week long leave is offered after the odd semester. Even semesters commence from the first week of January. After even semesters, you will get an interval of around 2.5 months. During which you can do your internship.
In odd semesters, the number of working days is more than in even semesters. For more details regarding the same, you can check the academic calendar available on the website of the institute.