DART

flutter datetime to string

dependencies:
  intl: ^0.17.0
  
import 'package:intl/intl.dart';

DateFormat dateFormat = DateFormat("yyyy-MM-dd HH:mm:ss");

String string = dateFormat.format(DateTime.now()); //Converting DateTime object to String

DateTime dateTime = dateFormat.parse("2019-07-19 8:40:23"); //Converting String to DateTime object

flutter string to date time

DateTime.parse("string date here");

convert timeofday to string flutter

String formatTimeOfDay(TimeOfDay tod) {
    final now = new DateTime.now();
    final dt = DateTime(now.year, now.month, now.day, tod.hour, tod.minute);
    final format = DateFormat.jm();  //"6:00 AM"
    return format.format(dt);
}

string to timeofday flutter

TimeOfDay _startTime = TimeOfDay(hour:int.parse(s.split(":")[0]),minute: int.parse(s.split(":")[1]));