diff --git a/functions.php b/functions.php
index 5ac80c87..35cc6064 100644
--- a/functions.php
+++ b/functions.php
@@ -1,4 +1,94 @@
 <?php
+if( !function_exists( 'date_diff' ) ) {
+	class DateInterval {
+		public $y;
+		public $m;
+		public $d;
+		public $h;
+		public $i;
+		public $s;
+		public $invert;
+		public $days;
+
+		public function format($format) {
+			$format = str_replace('%R%y', 
+				($this->invert ? '-' : '+') . $this->y, $format);
+			$format = str_replace('%R%m', 
+				($this->invert ? '-' : '+') . $this->m, $format);
+			$format = str_replace('%R%d', 
+				($this->invert ? '-' : '+') . $this->d, $format);
+			$format = str_replace('%R%h', 
+				($this->invert ? '-' : '+') . $this->h, $format);
+			$format = str_replace('%R%i', 
+				($this->invert ? '-' : '+') . $this->i, $format);
+			$format = str_replace('%R%s', 
+				($this->invert ? '-' : '+') . $this->s, $format);
+
+		$format = str_replace('%y', $this->y, $format);
+		$format = str_replace('%m', $this->m, $format);
+		$format = str_replace('%d', $this->d, $format);
+		$format = str_replace('%h', $this->h, $format);
+		$format = str_replace('%i', $this->i, $format);
+		$format = str_replace('%s', $this->s, $format);
+
+		return $format;
+		}
+	}
+
+	function date_diff(DateTime $date1, DateTime $date2) {
+
+		$diff = new DateInterval();
+
+		if($date1 > $date2) {
+			$tmp = $date1;
+			$date1 = $date2;
+			$date2 = $tmp;
+			$diff->invert = 1;
+		} else {
+			$diff->invert = 0;
+		}
+
+		$diff->y = ((int) $date2->format('Y')) - ((int) $date1->format('Y'));
+		$diff->m = ((int) $date2->format('n')) - ((int) $date1->format('n'));
+		if($diff->m < 0) {
+			$diff->y -= 1;
+			$diff->m = $diff->m + 12;
+		}
+		$diff->d = ((int) $date2->format('j')) - ((int) $date1->format('j'));
+		if($diff->d < 0) {
+			$diff->m -= 1;
+			$diff->d = $diff->d + ((int) $date1->format('t'));
+		}
+		$diff->h = ((int) $date2->format('G')) - ((int) $date1->format('G'));
+		if($diff->h < 0) {
+			$diff->d -= 1;
+			$diff->h = $diff->h + 24;
+		}
+		$diff->i = ((int) $date2->format('i')) - ((int) $date1->format('i'));
+		if($diff->i < 0) {
+			$diff->h -= 1;
+			$diff->i = $diff->i + 60;
+		}
+		$diff->s = ((int) $date2->format('s')) - ((int) $date1->format('s'));
+		if($diff->s < 0) {
+			$diff->i -= 1;
+			$diff->s = $diff->s + 60;
+		}
+
+		$start_ts   = $date1->format('U');
+		$end_ts   = $date2->format('U');
+		$days     = $end_ts - $start_ts;
+		$diff->days  = round($days / 86400);
+
+		if (($diff->h > 0 || $diff->i > 0 || $diff->s > 0))
+			$diff->days += ((bool) $diff->invert)
+				? 1
+				: -1;
+
+		return $diff;
+	}
+}
+
 if ( !function_exists( 'sportspress_nonce' ) ) {
 	function sportspress_nonce() {
 		echo '<input type="hidden" name="sportspress_nonce" id="sportspress_nonce" value="' . wp_create_nonce( SPORTSPRESS_PLUGIN_BASENAME ) . '" />';
diff --git a/readme.txt b/readme.txt
index 4d9a3c3e..438a7ee7 100644
--- a/readme.txt
+++ b/readme.txt
@@ -4,7 +4,7 @@ Tags: sports, sports journalism, teams, team management, fixtures, results, stan
 Donate link: https://www.paypal.com/cgi-bin/webscr?cmd=_xclick&business=support@themeboy.com&item_name=Donation+for+SportsPress
 Requires at least: 3.8
 Tested up to: 3.8.1
-Stable tag: 0.4
+Stable tag: 0.4.1
 License: GPLv3
 License URI: http://www.gnu.org/licenses/gpl-3.0.html
 
diff --git a/sportspress.php b/sportspress.php
index 3df21df2..cd90b9c5 100644
--- a/sportspress.php
+++ b/sportspress.php
@@ -6,7 +6,7 @@
 Plugin Name: SportsPress
 Plugin URI: http://themeboy.com/sportspress
 Description: Manage your club and its players, staff, events, league tables, and player lists.
-Version: 0.4
+Version: 0.4.1
 Author: ThemeBoy
 Author URI: http://themeboy.com/
 License: GPLv3
@@ -18,7 +18,7 @@ if ( !function_exists( 'add_action' ) ):
 	exit;
 endif;
 
-define( 'SPORTSPRESS_VERSION', '0.4' );
+define( 'SPORTSPRESS_VERSION', '0.4.1' );
 define( 'SPORTSPRESS_PLUGIN_URL', plugin_dir_url( __FILE__ ) );
 define( 'SPORTSPRESS_PLUGIN_BASENAME', plugin_basename( __FILE__ ) );
 define( 'SPORTSPRESS_PLUGIN_FILE', __FILE__ );