HV 6002 then KL 1659 at Schiphol
Porto → Amsterdam → Firenze
Timetable, Amsterdam time
23:55HV 6002 from Porto at the gate
20:55KL 1659 to Firenze leaves the gate
21 h apart on the timetable, overnight
KL 1659 leaves 21 h after HV 6002 arrives on the timetable: more than half a day, so not a connection we count.