You want to know the date sheet of HBSE, so here I am providing you with the required information of the same:

The Board of School Education, Haryana came into being under an Act of Legislation in 1969. The main functions of the Board are as under:-

(1) Prescribe the courses of instruction, text book and other books of books of study for school education;
(2) Conduct examinations for school education, admit to such examinations, on the prescribed conditions, candidates who pursue the prescribed courses of instruction, whether in recognized institutions or otherwise, and demand and receive the prescribed fees;
(3) Publish the results of such examinations, grant certificates and diplomas to persons who have passed such examinations and institute and award scholarships, medals and prizes;
(4) Prescribe conditions for recognition of schools and other institutions which send candidates to the examinations conducted by the Board in terms of teachers and their qualifications, curriculum equipment, buildings and other educational facilities.
(5) Ask for reports from the Education Directorate or the District Education Officers on the conditions applying for recognition and to direct inspection of such institutions.

Latest date sheet have not been published. When it will come I will update it.