

Every post date on the front page, written as how long ago it was
WP-RelativeDate rewrites your post and comment dates as how long ago they were: ‘Today’, ‘Yesterday’, ‘2 Days Ago’, ‘2 Weeks Ago’, ‘2 Hours Ago’, ‘2 Minutes Ago’, ‘2 Seconds Ago’.
There is nothing to configure and no settings screen. WP-RelativeDate rewrites your post and comment dates as soon as it is activated, and leaves anything more than a month old, or from a previous year, exactly as your theme printed it.
I spent most of my free time creating, updating, maintaining and supporting these plugins, if you really love my plugins and could spare me a couple of bucks, I will really appreciate it. If not feel free to use it without any obligations.
You need not do anything. WP-RelativeDate will automatically modify your post/comment date or time display. No text will be added if the post or comment is more than a month old.
[relativedate]
[relativedate date_format="jS F Y" ago_only="false"][relativetime]
[relativetime time_format="H:i" ago_only="false"]ago_only drops the date or time and leaves only the relative phrase. It accepts true/false, 1/0, yes/no and on/off.
relative_post_the_date( $format, $before, $after, $ago_only, $display ) — a drop-in replacement for the_date(). $before and $after carry markup, exactly as they do in the_date().The plugin has no settings screen. To leave a template’s dates alone, remove the filter before the loop:
remove_filter( 'get_the_date', 'relative_post_date', 999 );
The four callbacks are relative_post_date on get_the_date, relative_post_time on get_the_time, relative_comment_date on get_comment_date and relative_comment_time on get_comment_time, all at priority 999.
Removing the get_the_date filter also covers the_date(), which builds its output by calling get_the_date(). The same goes for the_time(), comment_date() and comment_time().