Compare c37370b ... +0 ... 35a688b

            self::setDefaultTimezone($testNow->getTimezone()->getName(), $testNow);

            $now = static::getMockedTestNow(\func_num_args() === 1 ? null : $tz);

            self::setDefaultTimezone($now->tzName, $now);

    private static function setDefaultTimezone($timezone, DateTimeInterface $date = null)

        $previous = null;

        $success = false;

            $success = date_default_timezone_set($timezone);

        } catch (Throwable $exception) {

            $previous = $exception;

        if (!$success) {

            $suggestion = @CarbonTimeZone::create($timezone)->toRegionName($date);

            throw new InvalidArgumentException(

                "Timezone ID '$timezone' is invalid".

                ($suggestion && $suggestion !== $timezone ? ", did you mean '$suggestion'?" : '.')."\n".

                "It must be one of the IDs from DateTimeZone::listIdentifiers(),\n".

                'For the record, hours/minutes offset are relevant only for a particular moment, '.

                'but not as a default timezone.',

                0,