firstDayOfYear static method

dynamic firstDayOfYear([
  1. dynamic dia
])

Implementation

static firstDayOfYear([dynamic dia]) {
  dia ??= DateTime.now();
  if (dia.runtimeType.toString() == 'String') dia = DateTime.parse(dia);
  DateTime date = dia;
  return DateTime.utc(date.year, 1, 1).toIso8601String().substring(0, 10);
}