#39169: Special Price To Date is wrongly validated on applySpecialPrice

- more targeted solution to cover only the question described in the issue

Author: KrasnoshchokBohdan

app/code/Magento/Catalog/Pricing/Price/SpecialPrice.php

@@ -1,7 +1,7 @@
 <?php
 /**
- * Copyright © Magento, Inc. All rights reserved.
- * See COPYING.txt for license details.
+ * Copyright 2015 Adobe
+ * All Rights Reserved.
  */
 
 namespace Magento\Catalog\Pricing\Price;
@@ -103,10 +103,16 @@ public function getSpecialToDate()
      */
     public function isScopeDateInInterval()
     {
+        $dateTo = $this->getSpecialToDate();
+        if ($dateTo && date('H:i:s', strtotime($dateTo)) !== '00:00:00') {
+            $dateToTimestamp = strtotime($dateTo);
+            $dateTo = date('Y-m-d H:i:s', $dateToTimestamp - 86400);
+        }
+
         return $this->localeDate->isScopeDateInInterval(
             WebsiteInterface::ADMIN_CODE,
             $this->getSpecialFromDate(),
-            $this->getSpecialToDate()
+            $dateTo
         );
     }
 

lib/internal/Magento/Framework/Stdlib/DateTime/Timezone.php

@@ -274,9 +274,9 @@ public function isScopeDateInInterval($scope, $dateFrom = null, $dateTo = null)
         $scopeTimeStamp = $this->scopeTimeStamp($scope);
         $fromTimeStamp = strtotime($dateFrom);
         $toTimeStamp = strtotime($dateTo);
-        if ($dateTo && date('H:i:s', strtotime($dateTo)) === '00:00:00') {
+        if ($dateTo) {
             // fix date YYYY-MM-DD 00:00:00 to YYYY-MM-DD 23:59:59
-            $toTimeStamp += 86399;
+            $toTimeStamp += 86400;
         }
 
         return !(!$this->_dateTime->isEmptyDate($dateFrom) && $scopeTimeStamp < $fromTimeStamp ||