To change date format displayed in Article and Articles Headline addon, you have to edit two template files:

• templates\newskit\sppagebuilder\addons\articles\site.php
• templates\newskit\sppagebuilder\addons\articles_headline\site.php

In the Article addon, the date format is defined by PHP DateTime format. Look for the line given below within the above given files and edit:

$output .= '<span class="sppb-meta-date" itemprop="dateCreated">' . Jhtml::_('date', $item->created, 'M d, H:i a') . '</span>';

Where: Y- year, m - month (number), M - month (name),  d - the day of the month (from 01 to 31), H - 24-hour format of an hour (00 to 23), i - minutes, etc.

Note: These functions depend on the locale settings of your server.

In the Article Headline addon, the date format is defined by the default Joomla format from your local translation. Within the above mentioned file, find & edit this line:

 $output .= '<span class="sppb-meta-date" itemprop="dateCreated">' . Jhtml::_('date', $item->created, 'DATE_FORMAT_LC3') . '</span>';

Date formats from Joomla! language\en-GB\en-GB.ini file:

DATE_FORMAT_LC="l, d F Y"
DATE_FORMAT_LC1="l, d F Y"
DATE_FORMAT_LC2="l, d F Y H:i"
DATE_FORMAT_LC3="d F Y"
DATE_FORMAT_LC4="Y-m-d"
DATE_FORMAT_LC5="Y-m-d H:i"
DATE_FORMAT_JS1="y-m-d"

Note: Order of date symbol depends on the locale translation file, so please check your es-ES.ini, de-DE.ini, pl-PL.ini etc. file first.