diff --git a/src/wp-admin/includes/upgrade.php b/src/wp-admin/includes/upgrade.php
index 090a5f1853e6f..068e28b040e33 100644
--- a/src/wp-admin/includes/upgrade.php
+++ b/src/wp-admin/includes/upgrade.php
@@ -992,7 +992,7 @@ function upgrade_110() {
 
 	$time_difference = $all_options->time_difference;
 
-	$server_time    = time() + gmdate( 'Z' );
+	$server_time    = time() + (int) gmdate( 'Z' );
 	$weblogger_time = $server_time + $time_difference * HOUR_IN_SECONDS;
 	$gmt_time       = time();
 
diff --git a/src/wp-includes/class-wp-date-query.php b/src/wp-includes/class-wp-date-query.php
index b8ae95461c1a9..76b70849493dd 100644
--- a/src/wp-includes/class-wp-date-query.php
+++ b/src/wp-includes/class-wp-date-query.php
@@ -317,7 +317,7 @@ public function validate_date_values( $date_query = array() ) {
 				$_year = $date_query['year'];
 			}
 
-			$max_days_of_year = gmdate( 'z', mktime( 0, 0, 0, 12, 31, $_year ) ) + 1;
+			$max_days_of_year = (int) gmdate( 'z', mktime( 0, 0, 0, 12, 31, $_year ) ) + 1;
 		} else {
 			// Otherwise we use the max of 366 (leap-year).
 			$max_days_of_year = 366;