Find the enrollment date for all the tests that have "Pass" result.
SELECT T1.date_of_enrolment FROM Student_Course_Enrolment AS T1 JOIN Student_Tests_Taken AS T2 ON T1.registration_id  =  T2.registration_id WHERE T2.test_result  =  "Pass"
"Geçiş" sonucuna sahip tüm testler için kayıt tarihini bulun.