Fake CBSE 12th Datesheet 2023 Goes Viral. Board Issues Statement CBSE Class 12 Date Sheet 2023: The fake date sheet claimed that CBSE will begin the Class 10, 12 exams from February 15 and continue till April 9. The exams will be held in 2 shifts -10:30 to 1:30; 2:30 to 5:30 PM.