          1. Let _y1_ be _yearMonth_.[[Year]].
          1. Let _m1_ be _yearMonth_.[[Month]].
          1. Let _d1_ be _baseDate_.[[Day]].
        1. If _y1_ ‚â† _isoDate2_.[[Year]], then
          1. If _sign_ √ó (_y1_ - _isoDate2_.[[Year]]) > 0, return *true*.
        1. Else if _m1_ ‚â† _isoDate2_.[[Month]], then
          1. If _sign_ √ó (_m1_ - _isoDate2_.[[Month]]) > 0, return *true*.
        1. Else if _d1_ ‚â† _isoDate2_.[[Day]], then
          1. If _sign_ √ó (_d1_ - _isoDa