The 37th Bangladesh Civil Service (BCS) preliminary examination will be held on September 30.The test will be held simultaneously in Dhaka, Chittagong, Rajshahi, Barisal, Khulna, Sylhet and Rangpur centers, A E M Neshar Uddin (cadre), Controller of Examination of Bangladesh Public Service Commission said on Tuesday.The two-hour long test will start at 9:30am.