KL 1920 then U2 7927 at Schiphol
Zurich → Amsterdam → Prague
Timetable, Amsterdam time
13:35KL 1920 from Zurich at the gate
07:15U2 7927 to Prague leaves the gate
17 h 40 apart on the timetable, overnight
U2 7927 leaves 17 h 40 after KL 1920 arrives on the timetable: more than half a day, so not a connection we count.