here is the code which i already formatted it to be [yyyy-MM-dd] but it also contains 00:00:00 :
child: Text(
_selectedDate == null
? 'No Date Choosen!'
: '${DateFormat('yyyy-MM-dd').format(_selectedDate)}',
style: TextStyle(
color: Colors.white, fontSize: 16),),
You need to create a new DateFormat object.
final df = new DateFormat('yyyy-MM-dd');
Text(_selectedDate == null ? 'No Date Choosen!' : '${df.format(_selectedDate)}');