JSFiddle - React, Tailwind, and code Playground

HTML

<div class="dvApptHolderSub">								
	<div style="position:absolute;
  float:left;
  width:50%;
  margin-right:-5px;
  height: 200px; background: rgba(255, 0, 0, 0.8);">
		<div style="float: none; width: 100% !important;">
			<div>
				<a href="javascript:void(0);">
					<span>MON</span>
					<br>
					<span>050812</span>
				</a>
			</div>
		</div>
		<div style="float: none; width: 100% !important;">
			<div>
				<div>
					<span>0830</span>
					<br>
					<span>Beverly Hills Hospital</span>
				</div>
			</div>
		</div>
	</div>
	<div style="position:absolute;
  float:left;
  width:50%;
  margin-right:-5px;
  height: 200px; background: rgba(0, 255, 0, 0.8);">
		<div style="float: none; width: 100% !important;">
			<div class="tabGroup">
				<a href="javascript:void(0);">
					<span>TUESDAY</span>
					<br>
					<span>050912</span>
				</a>
			</div>
		</div>
		<div style="float: none; width: 100% !important;">
			<div>
				<div>
					<span>0830</span>
					<br>
					<span>Beverly Hills Center</span>
				</div>
			</div>
		</div>
	</div>
	<div style="position:absolute;
  float:left;
  width:50%;
  margin-right:-5px;
  height: 200px; background: rgba(0, 0, 255, 0.8);">
		<div style="float: none; width: 100% !important;">
			<div class="tabGroup">
				<a href="javascript:void(0);">
					<span>WEDNESDAY</span>
					<br>
					<span>051012</span>
				</a>
			</div>
		</div>
		<div style="float: none; width: 100% !important;">
			<div>
				<div>
					<span>0830</span>
					<br>
					<span>Beverly Hills Cyclone</span>
				</div>
			</div>
		</div>
	</div>
</div>

CSS

div.dvApptHolderSub {
      position:relative;
  z-index: 10;
  background-color: #ffffff;
  padding: 0 !important;
  border-radius: 4px;
  -moz-border-radius: 4px;
  border: 1px solid #ddd;
  margin-top: 6px;
  margin-left: 0.4%;
  -webkit-box-shadow: 0 6px 12px rgba(0,0,0,.175);
  box-shadow: 0 6px 12px rgba(0,0,0,.175);
  -moz-box-shadow: 0 6px 12px rgba(0,0,0,.175);
  background-clip: padding-box;
  opacity: 0.97;
  filter: alpha(opacity=97);
  width: 250px;
  height:200px;
  float: left;
  overflow:auto;
  white-space : nowrap;
}
* {
    padding: 0;
    margin: 0;
}