People already widely use the +1 (555) 123-0987 phone number format, so making that a standard wouldn't be as bad as trying to get people to use ISO8601 (though

People already widely use the +1 (555) 123-0987 phone number format, so making that a standard wouldn't be as bad as trying to get people to use ISO8601 (though I do use that date format in file names for sorting).