[Solved] Running multiple sorts on JS array

 var arr = [{"Event_code":"BW-087","Interest_area":"Information technology","Start_time":"9:00 AM","End_time":"3:00 PM","Session_type":"Experience","all_day_evt":true},{"Event_code":"BW-161","Interest_area":"Media, Communication and creative arts","Start_time":"9:00 AM","End_time":"3:00 PM","Session_type":"Experience","all_day_evt":true},{"Event_code":"BW-114","Interest_area":"Nursing and midwifery","Start_time":"9:00 AM","End_time":"3:00 PM","Session_type":"Tour","all_day_evt":true},{"Event_code":"BW-033","Interest_area":"","Start_time":"9:00 AM","End_time":"3:00 PM","Session_type":"General information session","all_day_evt":true},{"Event_code":"BW-115","Interest_area":"Food, Nutrition and dietetics","Start_time":"9:30 AM","End_time":"3:00 PM","Session_type":"Tour","all_day_evt":true},{"Event_code":"BW-060","Interest_area":"Sport","Start_time":"9:30 AM","End_time":"3:00 PM","Session_type":"Tour","all_day_evt":true},{"Event_code":"BW-081","Interest_area":"Information technology","Start_time":"9:00 AM","End_time":"9:30 AM","Session_type":"Course information session","all_day_evt":false},{"Event_code":"BW-170","Interest_area":"","Start_time":"9:30 AM","End_time":"10:30 AM","Session_type":"General information session","all_day_evt":false,"clash":"This clashes with another session"},{"Event_code":"BW-032","Interest_area":"","Start_time":"9:30 AM","End_time":"10:00 AM","Session_type":"General information session","all_day_evt":false},{"Event_code":"BW-096","Interest_area":"Media, Communication and creative arts","Start_time":"10:00 AM","End_time":"12:00 PM","Session_type":"Experience","all_day_evt":false},{"Event_code":"BW-163","Interest_area":"Business","Start_time":"10:00 AM","End_time":"2:00 PM","Session_type":"Experience","all_day_evt":false,"clash":"This clashes with another session"},{"Event_code":"BW-048","Interest_area":"Media, Communication and creative arts","Start_time":"12:00 PM","End_time":"12:30 PM","Session_type":"Experience","all_day_evt":false},{"Event_code":"BW-128","Interest_area":"Media, Communication and creative arts","Start_time":"12:00 PM","End_time":"12:30 PM","Session_type":"Tour","all_day_evt":false,"clash":"This clashes with another session"},{"Event_code":"BW-018","Interest_area":"Sciences","Start_time":"12:30 PM","End_time":"2:30 PM","Session_type":"Tour","all_day_evt":false,"clash":"This clashes with another session"},{"Event_code":"BW-013","Interest_area":"Sciences, Engineering, Information technology, Architecture and built environment, Environment","Start_time":"12:30 PM","End_time":"1:00 PM","Session_type":"Course information session","all_day_evt":false},{"Event_code":"BW-039","Interest_area":"Media, Communication and creative arts","Start_time":"1:00 PM","End_time":"1:30 PM","Session_type":"Experience","all_day_evt":false},{"Event_code":"BW-162","Interest_area":"Education and teaching","Start_time":"1:00 PM","End_time":"1:30 PM","Session_type":"Tour","all_day_evt":false,"clash":"This clashes with another session"}];
arr.sort((x,y) => y.all_day_evt- x.all_day_evt || ((new Date('1970/01/01 ' + x.Start_time)) - (new Date('1970/01/01 ' + y.Start_time))) || Boolean(x.clash) - Boolean(y.clash));
console.log(arr);