I am a little bit in doubt how I solve this the best way. In the footer of this page: Portfolio , there is the following:
04-11-2016 : Design In Portfolio
CSS
span { float: right; }
HTML
<li>
<a href="#" target="_blank">
Hvad er Mautic?    
</a>
<span class="newsDate">06-11-2016</span>
</li>
You can try this:-
float:right;
Its contained inside a block element so add "float: right"
to those spans to get your right alignment =).
Edit. Someone shot down the float idea in a now deleted comment. Floating does present some layout ugliness for when your text on the left becomes too large. You could instead use a fancy flex solution that will hold up across different context a bit better.
For flex, set the anchor to "display: flex"
and the span to "flex: 1; text-align: right; white-space: nowrap;"
.