Please follow these instructions:
1. open inc/php/the-events-calendar.php
2. find this line:
'eventDisplay'=> 'upcoming',
and change it to read:
'eventDisplay'=> 'all',
This will allow you to have all events – not just upcoming ones – in your campaign trail. Events will be shown in ascending order – from older to newer.
However, there is a way to show events in descending order, just add this line:
'order' => 'DESC',
below above changed line. So, your code will look like this:
'eventDisplay'=> 'all', 'order' => 'DESC',