By using this :
Text(new DateTime.fromMillisecondsSinceEpoch(values[index][\"start_time\"]*1000).toString(),
I am getting the ty
If you use the intl package
final f = new DateFormat('yyyy-MM-dd hh:mm'); Text(f.format(new DateTime.fromMillisecondsSinceEpoch(values[index]["start_time"]*1000)));