<div class="container h-100"> <div class="row align-items-center h-100"> <div class="col-6 mx-auto"> <div class="jumbotron"> I'm vertically centered </div> </div> </div> </div>
<div class="container h-100"> <div class="row align-items-center h-100"> <div class="col-6 mx-auto"> <div class="jumbotron"> I'm vertically centered </div> </div> </div> </div>