KL 836 then HV 6867 at Schiphol
Singapore → Amsterdam → Athens
Timetable, Amsterdam time
08:35KL 836 from Singapore at the gate
07:00HV 6867 to Athens leaves the gate
22 h 25 apart on the timetable, overnight
HV 6867 leaves 22 h 25 after KL 836 arrives on the timetable: more than half a day, so not a connection we count.