JSFiddle - React, Tailwind, and code Playground

HTML

<br />
<div class="leftHeader">In</div>
<div class="rightHeader">Day/Week</div>
<div class="clear"></div>
<br />
<br />
<span>In</span>
<span class="absolute-right">Day/Week</span>
<br />
<br />
<span>In</span>
<span class="relative-right">Day/Week</span>

CSS

div.leftHeader
{
    float: left;
}
div.rightHeader
{
    float: right;
}
div.clear
{
    clear: both;
}
span.absolute-right
{
    position:absolute;
    right:0;
    margin-right:10px;
}
span.relative-right
{
    position:relative;
    left:84%;
}