MAGETWO-45496: Filtering by date is not working in grids

Author: Michael Logvin

app/code/Magento/Backend/Block/Widget/Grid/Column/Filter/Date.php

@@ -13,11 +13,6 @@
  */
 class Date extends \Magento\Backend\Block\Widget\Grid\Column\Filter\AbstractFilter
 {
-    /**
-     * Value of DATE_TYPE means that date value don't need to convert back to UTC
-     */
-    const DATE_TYPE = 'static';
-
     /**
      * @var \Magento\Framework\Math\Random
      */
@@ -215,9 +210,7 @@ protected function _convertDate($date)
         $simpleRes = new \DateTime(null, $adminTimeZone);
         $simpleRes->setTimestamp($formatter->parse($date));
         $simpleRes->setTime(0, 0, 0);
-        if ($this->getColumn()->getData('date_type') !== static::DATE_TYPE) {
-            $simpleRes->setTimezone(new \DateTimeZone('UTC'));
-        }
+        $simpleRes->setTimezone(new \DateTimeZone('UTC'));
         return $simpleRes;
     }
 }