CREATE TABLE table_18278508_2 (date_performed VARCHAR(255), main_contestant VARCHAR(255), co_contestant__yaar_vs_pyaar_ VARCHAR(255))
What date did Jatin Shah and Shalini Chandran perform?
    
SQL: SELECT date_performed FROM table_18278508_2 WHERE main_contestant = "Jatin Shah" AND co_contestant__yaar_vs_pyaar_ = "Shalini Chandran"