[Plugin: Events Manager] Event headings align left

any sample link? also try to use the template files to do the customization

http://wp-events-plugin.com/documentation/using-template-files/

sorry, you can change that in the settings Formats/Layouts > Events Format > Default event list format header

actually, it also depends on your theme. Or try this:

#event-time { text-align:left; }
or
<th id=”event-time” width=”150″ style=”text-align:left;”>Dato/tid</th>