se*, throw a *RangeError* exception.
          1. Let _epochNs_ be ? GetEpochNanosecondsFor(_timeZone_, _isoDateTime_, ~compatible~).
        1. Return ! CreateTemporalZonedDateTime(_epochNs_, _timeZone_, _plainDate_.[[Calendar]]).
      </emu-alg>
    </emu-clause>

    <emu-clause id="sec-temporal.plaindate.prototype.tostring">
      <h1>Temporal.PlainDate.prototype.toString ( [ _options_ ] )</h1>
      <p>This method performs the following steps when called:</p>
      <emu-alg>
        1. Let _plainDate_