FR 612 then FR 1958 at Dublin
Killarney → Dublin → Nice
Timetable, Dublin time
18:30FR 612 from Killarney at the gate
16:30FR 1958 to Nice leaves the gate
22 h apart on the timetable, overnight
FR 1958 leaves 22 h after FR 612 arrives on the timetable: more than half a day, so not a connection we count.