parse method Null safety
Given user input, attempt to parse the
inputString into the anticipated
format, treating it as being in the local timezone.
inputString does not match our format, throws a FormatException.
This will accept dates whose values are not strictly valid, or strings
with additional characters (including whitespace) after a valid date. For
stricter parsing, use parseStrict.
DateTime parse(String inputString, [bool utc = false]) => _parse(inputString, utc: utc, strict: false);