DART

dart timestamp

void main() {
  print(new DateTime.now().millisecondsSinceEpoch);
}

flutter date time to timestamp

DateTime currentPhoneDate = DateTime.now(); //DateTime

Timestamp myTimeStamp = Timestamp.fromDate(currentPhoneDate); //To TimeStamp

DateTime myDateTime = myTimeStamp.toDate(); // TimeStamp to DateTime

print("current phone data is: $currentPhoneDate");
print("current phone data is: $myDateTime");

Get current timestamp in flutter or dart

var timestamp = DateTime.now().millisecondsSinceEpoch.toString()
print(timestamp);

flutter date timestamp

new DateTime.now().millisecondsSinceEpoch;