JKBOSE Class 12th Date Sheet Session Bi-Annual 2020 Private (Summer Zone) Jammu Division. JKBOSE Class 12th Date Sheet Private 2020. Pertaining to Higher Secondary Examination Part-II (Class 12th) Session Bi-Annual 2020 Private (Summer Zone) of Jammu Division for candidates who have been declared reappear in four (04)/failcd /Fresh(Private)/Division improvement/Additional Subjects/English only/Vocational subjects.