-clause id="sec-temporal.plaindate.prototype.since">
      <h1>Temporal.PlainDate.prototype.since ( _other_ [ , _options_ ] )</h1>
      <p>This method performs the following steps when called:</p>
      <emu-alg>
        1. Let _plainDate_ be the *this* value.
        1. Perform ? RequireInternalSlot(_plainDate_, [[InitializedTemporalDate]]).
        1. Return ? DifferenceTemporalPlainDate(~since~, _plainDate_, _other_, _options_).
      </emu-alg>
    </emu-clause>

    <emu-clause id="sec-temporal.plaind