FR 819 then FR 1958 at Dublin
Edinburgh → Dublin → Nice
Timetable, Dublin time
16:55FR 819 from Edinburgh at the gate
16:30FR 1958 to Nice leaves the gate
23 h 35 apart on the timetable, overnight
FR 1958 leaves 23 h 35 after FR 819 arrives on the timetable: more than half a day, so not a connection we count.