SA 566 then 4Z 917 at Johannesburg
Durban → Johannesburg → East London
Timetable, Johannesburg time
18:10SA 566 from Durban at the gate
18:054Z 917 to East London leaves the gate
23 h 55 apart on the timetable, overnight
4Z 917 leaves 23 h 55 after SA 566 arrives on the timetable: more than half a day, so not a connection we count.