Выберите дату без времени трепета
var dateTime = DateTime.parse("2019-10-22 00:00:00.000");
var formate1 = "${dateTime.day}-${dateTime.month}-${dateTime.year}";
var formate2 = "${dateTime.year}-${dateTime.month}-${dateTime.day}";
print (formate1);
print (formate2);
Ilham Guenane