'When' doesn't actually allow for a looser translation than 'in the day that'. 'After' would, but 'when' doesn't. And Young's Literal Translation still says 'in the day of'. And we're back around to the question of why was it necessary for somebody, even a volunteer, to die a horrible death to make up for everybody else's transgressions—not to mention the question of why the consequences of Eve's disobedience affected her children. They might have to grow up outside the Garden because their parents weren't allowed in anymore, but once they were grown and before Cain got murderous, why were they still made to suffer for their parents' error?