FR 80 then DY 3640 at Copenhagen
Budapest → Copenhagen → Nice
Timetable, Copenhagen time
19:40FR 80 from Budapest at the gate
08:00DY 3640 to Nice leaves the gate
12 h 20 apart on the timetable, overnight
DY 3640 leaves 12 h 20 after FR 80 arrives on the timetable: more than half a day, so not a connection we count.