diff --git a/wp-includes/functions.php b/wp-includes/functions.php
index 497d264a89..f0e91851cb 100644
--- a/wp-includes/functions.php
+++ b/wp-includes/functions.php
@@ -186,7 +186,7 @@ function wp_maybe_decline_date( $date ) {
 			$months = $wp_locale->month;
 
 			foreach ( $months as $key => $month ) {
-				$months[ $key ] = '#' . $month . '#';
+				$months[ $key ] = '#\b' . $month . '\b#u';
 			}
 
 			$date = preg_replace( $months, $wp_locale->month_genitive, $date );
diff --git a/wp-includes/version.php b/wp-includes/version.php
index da751dc701..97d4dd908a 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6-alpha-37716';
+$wp_version = '4.6-alpha-37717';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.