bbPress.org

dashboard>settings>general>date format

bbpress just follows the WordPress format you set, as it presumes you want dates to look the same all over your site

otherwise

bbp style pack

once activated go to

dashboard>settings>bbp style pack>Freshness Display lets you play with how it is displayed

ok looks like you are going to need to get familiar with the templates and some coding then

In essence you need to copy some templates across to your child theme, and then amend them

You can copy all the templates across, but you only need to copy those that you want to change, and it is better just to do this, as then you know which you have altered.

so if you wanted to amend loop-single-forum you would do the following

create a directory on your theme called ‘bbpress’
ie wp-content/themes/%your-theme-name%/bbpress

where %your-theme-name% is the name of your theme

find
wp-content/plugins/bbpress/templates/default/bbpress/loop-single-forum.php
Make a copy of this file, and put in in the directory called bbpress that you created above, so you end up with
wp-content/themes/%your-theme-name%/bbpress/loop-single-forum.php
bbPress will now use this template instead of the original
and you can amend this

ok, how familiar with adding filters are you ?

ok, the existing function is

function bbp_get_topic_post_date( $topic_id = 0, $humanize = false, $gmt = false ) {
		$topic_id = bbp_get_topic_id( $topic_id );

		// 4 days, 4 hours ago
		if ( !empty( $humanize ) ) {
			$gmt_s  = !empty( $gmt ) ? 'U' : 'G';
			$date   = get_post_time( $gmt_s, $gmt, $topic_id );
			$time   = false; // For filter below
			$result = bbp_get_time_since( $date );

		// August 4, 2012 at 2:37 pm
		} else {
			$date   = get_post_time( get_option( 'date_format' ), $gmt, $topic_id, true );
			$time   = get_post_time( get_option( 'time_format' ), $gmt, $topic_id, true );
			$result = sprintf( _x( '%1$s at %2$s', 'date at time', 'bbpress' ), $date, $time );
		}

		return apply_filters( 'bbp_get_topic_post_date', $result, $topic_id, $humanize, $gmt, $date, $time );
	}

so we can filter this as follows :

add_filter ('bbp_get_topic_post_date' , 'rew_date' , 10 , 6) ;

function rew_date ($result, $topic_id, $humanize, $gmt, $date, $time) {
	$result = 'hello' ;

return $result ;
}

This should then say ‘hello’ so all we want to do is change $result to read whatever you want – so what do you want it to say ?