This is the snippet for to get date and time without using any external libraries such as Intl. which is not bad to use but this snippet is perfect for o get date and time or sometime jsut date. Much better than using library.

date_time_format.dart

// Define a simple format function from scratch
String dateTimeformat({required DateTime time, bool dateOnly = false}) {
  String year = time.year.toString();

  // Add "0" on the left if month is from 1 to 9
  String month = time.month.toString().padLeft(2, '0');

  // Add "0" on the left if day is from 1 to 9
  String day = time.day.toString().padLeft(2, '0');

  // Add "0" on the left if hour is from 1 to 9
  String hour = time.hour.toString().padLeft(2, '0');

  // Add "0" on the left if minute is from 1 to 9
  String minute = time.minute.toString().padLeft(2, '0');

  // Add "0" on the left if second is from 1 to 9
  String second = time.second.toString();

  // If you only want year, month, and date
  if (dateOnly == false) {
    return "$year-$month-$day $hour:$minute:$second";
  }

  // return the "yyyy-MM-dd HH:mm:ss" format
  return "$year-$month-$day";
}

// Test our function
// void main() {
//   DateTime currentTime = DateTime.now();

//   // Full date and time
//   final result1 = dateTimeformat(time: currentTime);
//   print(result1);

//   // Date only
//   final result2 = dateTimeformat(time: currentTime, dateOnly: true);
//   print(result2);
// }