6E 5239 then 6E 6020 at Mumbai
Kolkata → Mumbai → Ahmedabad
Timetable, Mumbai time
12:106E 5239 from Kolkata at the gate
09:306E 6020 to Ahmedabad leaves the gate
21 h 20 apart on the timetable, overnight
6E 6020 leaves 21 h 20 after 6E 5239 arrives on the timetable: more than half a day, so not a connection we count.