diff --git a/wp-includes/general-template.php b/wp-includes/general-template.php
index 061ebef6fd..a24c5b91c2 100644
--- a/wp-includes/general-template.php
+++ b/wp-includes/general-template.php
@@ -1693,8 +1693,9 @@ function get_archives_link( $url, $text, $format = 'html', $before = '', $after
 	 * @param string $format    Link format. Can be 'link', 'option', 'html', or custom.
 	 * @param string $before    Content to prepend to the description.
 	 * @param string $after     Content to append to the description.
+	 * @param bool   $selected  True if the current page is the selected archive
 	 */
-	return apply_filters( 'get_archives_link', $link_html, $url, $text, $format, $before, $after );
+	return apply_filters( 'get_archives_link', $link_html, $url, $text, $format, $before, $after, $selected );
 }
 
 /**
@@ -1820,7 +1821,9 @@ function wp_get_archives( $args = '' ) {
 				if ( $r['show_post_count'] ) {
 					$r['after'] = ' (' . $result->posts . ')' . $after;
 				}
-				$output .= get_archives_link( $url, $text, $r['format'], $r['before'], $r['after'] );
+				$selected = is_archive() && ( string ) $r[ 'year' ] === $result->year
+							&& ( string ) $r[ 'monthnum' ] === $result->month;
+				$output .= get_archives_link( $url, $text, $r['format'], $r['before'], $r['after'], $selected );
 			}
 		}
 	} elseif ( 'yearly' == $r['type'] ) {
@@ -1842,7 +1845,8 @@ function wp_get_archives( $args = '' ) {
 				if ( $r['show_post_count'] ) {
 					$r['after'] = ' (' . $result->posts . ')' . $after;
 				}
-				$output .= get_archives_link( $url, $text, $r['format'], $r['before'], $r['after'] );
+				$selected = is_archive() && ( string ) $r[ 'year' ] === $result->year;
+				$output .= get_archives_link( $url, $text, $r['format'], $r['before'], $r['after'], $selected );
 			}
 		}
 	} elseif ( 'daily' == $r['type'] ) {
@@ -1865,7 +1869,10 @@ function wp_get_archives( $args = '' ) {
 				if ( $r['show_post_count'] ) {
 					$r['after'] = ' (' . $result->posts . ')' . $after;
 				}
-				$output .= get_archives_link( $url, $text, $r['format'], $r['before'], $r['after'] );
+				$selected = is_archive() && ( string ) $r[ 'year' ] === $result->year
+							&& ( string ) $r[ 'monthnum' ] === $result->month
+							&& ( string ) $r[ 'day' ] === $result->dayofmonth;
+				$output .= get_archives_link( $url, $text, $r['format'], $r['before'], $r['after'], $selected );
 			}
 		}
 	} elseif ( 'weekly' == $r['type'] ) {
@@ -1901,7 +1908,9 @@ function wp_get_archives( $args = '' ) {
 					if ( $r['show_post_count'] ) {
 						$r['after'] = ' (' . $result->posts . ')' . $after;
 					}
-					$output .= get_archives_link( $url, $text, $r['format'], $r['before'], $r['after'] );
+					$selected = is_archive() && ( string ) $r[ 'year' ] === $result->yr
+								&& ( string ) $r[ 'week' ] === $result->week;
+					$output .= get_archives_link( $url, $text, $r['format'], $r['before'], $r['after'], $selected );
 				}
 			}
 		}
@@ -1924,7 +1933,8 @@ function wp_get_archives( $args = '' ) {
 					} else {
 						$text = $result->ID;
 					}
-					$output .= get_archives_link( $url, $text, $r['format'], $r['before'], $r['after'] );
+					$selected = $result->ID === get_the_ID();
+					$output .= get_archives_link( $url, $text, $r['format'], $r['before'], $r['after'], $selected );
 				}
 			}
 		}
diff --git a/wp-includes/post.php b/wp-includes/post.php
index 6657e462c4..7e46f698ff 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -507,6 +507,7 @@ function update_attached_file( $attachment_id, $file ) {
  * The path is relative to the current upload dir.
  *
  * @since 2.9.0
+ * @access private
  *
  * @param string $path Full path to the file.
  * @return string Relative path on success, unchanged path on failure.
@@ -913,6 +914,7 @@ function get_page_statuses() {
  * Return statuses for privacy requests.
  *
  * @since 4.9.6
+ * @access private
  *
  * @return array
  */
@@ -2481,6 +2483,7 @@ function unstick_post( $post_id ) {
  * Return the cache key for wp_count_posts() based on the passed arguments.
  *
  * @since 3.9.0
+ * @access private
  *
  * @param string $type Optional. Post type to retrieve count Default 'post'.
  * @param string $perm Optional. 'readable' or empty. Default empty.
@@ -4903,6 +4906,7 @@ function get_page_hierarchy( &$pages, $page_id = 0 ) {
  * $children contains parent-children relations
  *
  * @since 2.9.0
+ * @access private
  *
  * @see _page_traverse_name()
  *
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 0ae4635eb8..f9626fba74 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.1-beta1-44635';
+$wp_version = '5.1-beta1-44636';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.