CBSE Date Sheet
Central Board of Secondary Education (CBSE) to conduct the Class 10 and Class 12 examinations from February 15, 2020; while the exams for Class 12 will end on March 30. The Class 10 exams will conclude on March 20.

http://cbse.nic.in/newsite/attach/CLASS%20X_DATESHEET_2020%20EXAMS.pdf
Alternate Link to Download CBSE 12th Exam Date Sheet PDF http://cbse.nic.in/newsite/attach/CLASS%20XII_DATESHEET_2020%20EXAMS.pdf