Technically it is all about status since a visa is about entry. Like the date on your visa is the window you have to enter the country but you'd have an I-94 or some status forum that dictates the parameters of your stay. (though yeah, everyone just calls this "overstaying your visa") (IANAL but have travel abroad before and well... I was in grad school and conversations about visa and status come up a lot when the majority of students have temporary status and there's a president talking about changing the rules)