Bootstrap CSS class .align-content-*-end

<div class="d-flex flex-wrap align-content-end">
  <div class="p-2">Flex item</div>
  <div class="p-2">Flex item</div>
  <div class="p-2">Flex item</div>
  ...
</div>

<!-- responsive variations -->
<div class="d-flex align-content-sm-end">...</div>
<div class="d-flex align-content-md-end">...</div>
<div class="d-flex align-content-lg-end">...</div>
<div class="d-flex align-content-xl-end">...</div>