Index: src/wp-includes/date.php
===================================================================
--- src/wp-includes/date.php	(revision 31181)
+++ src/wp-includes/date.php	(working copy)
@@ -109,28 +109,30 @@
 	 *                                           'post_modified', 'post_modified_gmt', 'comment_date', 'comment_date_gmt'.
 	 *             @type string       $compare       Optional. The comparison operator. Default '='.
 	 *                                               Accepts '=', '!=', '>', '>=', '<', '<=', 'IN', 'NOT IN',
-	 *                                               'BETWEEN', 'NOT BETWEEN'.
+	 *                                               'BETWEEN', 'NOT BETWEEN'. 'IN', 'NOT IN', 'BETWEEN', and 'NOT BETWEEN'
+	 *                                               comparisons support arrays in some time-related parameters.
 	 *             @type bool         $inclusive     Optional. Include results from dates specified in 'before' or
 	 *                                               'after'. Default false.
-	 *             @type int          $year          Optional. The four-digit year number. Default empty. Accepts
-	 *                                               any four-digit year.
-	 *             @type int          $month         Optional. The two-digit month number. Default empty.
-	 *                                               Accepts numbers 1-12.
-	 *             @type int          $week          Optional. The week number of the year. Default empty.
-	 *                                               Accepts numbers 0-53.
-	 *             @type int          $dayofyear     Optional. The day number of the year. Default empty.
-	 *                                               Accepts numbers 1-366.
-	 *             @type int          $day           Optional. The day of the month. Default empty.
-	 *                                               Accepts numbers 1-31.
-	 *             @type int          $dayofweek     Optional. The day number of the week. Default empty.
-	 *                                               Accepts numbers 1-7 (1 is Sunday).
-	 *             @type int          $dayofweek_iso Optional. The day number of the week (ISO). Accepts numbers 1-7
-	 *                                               (1 is Monday). Default empty.
-	 *             @type int          $hour          Optional. The hour of the day. Default empty. Accepts numbers 0-23.
-	 *             @type int          $minute        Optional. The minute of the hour. Default empty. Accepts
-	 *                                               numbers 0-60.
-	 *             @type int          $second        Optional. The second of the minute. Default empty.
-	 *                                               Accepts numbers 0-60.
+	 *             @type int|array    $year          Optional. The four-digit year number. Default empty.
+	 *                                               Accepts any four-digit year or an array of years if $compare supports it.
+	 *             @type int|array    $month         Optional. The two-digit month number. Default empty.
+	 *                                               Accepts numbers 1-12 or an array of numbers if $compare supports it.
+	 *             @type int|array    $week          Optional. The week number of the year. Default empty.
+	 *                                               Accepts numbers 0-53 or an array of numbers if $compare supports it.
+	 *             @type int|array    $dayofyear     Optional. The day number of the year. Default empty.
+	 *                                               Accepts numbers 1-366 or an array of numbers if $compare supports it.
+	 *             @type int|array    $day           Optional. The day of the month. Default empty.
+	 *                                               Accepts numbers 1-31 or an array of numbers if $compare supports it.
+	 *             @type int|array    $dayofweek     Optional. The day number of the week. Default empty.
+	 *                                               Accepts numbers 1-7 (1 is Sunday) or an array of numbers if $compare supports it.
+	 *             @type int|array    $dayofweek_iso Optional. The day number of the week (ISO). Default empty.
+	 *                                               Accepts numbers 1-7 (1 is Monday) or an array of numbers if $compare supports it.
+	 *             @type int|array    $hour          Optional. The hour of the day. Default empty.
+	 *                                               Accepts numbers 0-23 or an array of numbers if $compare supports it.
+	 *             @type int|array    $minute        Optional. The minute of the hour. Default empty.
+	 *                                               Accepts numbers 0-60 or an array of numbers if $compare supports it.
+	 *             @type int|array    $second        Optional. The second of the minute. Default empty.
+	 *                                               Accepts numbers 0-60 or an array of numbers if $compare supports it.
 	 *         }
 	 *     }
 	 * }