--- a/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/OLE.php
+++ b/vendor/phpoffice/phpspreadsheet/src/PhpSpreadsheet/Shared/OLE.php
@@ -493,42 +493,33 @@
      * Utility function
      * Returns a string for the OLE container with the date given.
      *
-     * @param int $date A timestamp
+     * @param float|int $date A timestamp
      *
      * @return string The string for the OLE container
      */
-    public static function localDateToOLE($date)
+    public static function localDateToOLE($date): string
     {
-        if (!isset($date)) {
+        if (!$date) {
             return "\x00\x00\x00\x00\x00\x00\x00\x00";
         }
-
-        // factor used for separating numbers into 4 bytes parts
-        $factor = pow(2, 32);
+        $dateTime = Date::dateTimeFromTimestamp("$date");

         // days from 1-1-1601 until the beggining of UNIX era
         $days = 134774;
         // calculate seconds
-        $big_date = $days * 24 * 3600 + gmmktime(date('H', $date), date('i', $date), date('s', $date), date('m', $date), date('d', $date), date('Y', $date));
+        $big_date = $days * 24 * 3600 + (float) $dateTime->format('U');
         // multiply just to make MS happy
         $big_date *= 10000000;

-        $high_part = floor($big_date / $factor);
-        // lower 4 bytes
-        $low_part = floor((($big_date / $factor) - $high_part) * $factor);
-
         // Make HEX string
         $res = '';

-        for ($i = 0; $i < 4; ++$i) {
-            $hex = $low_part % 0x100;
-            $res .= pack('c', $hex);
-            $low_part /= 0x100;
-        }
-        for ($i = 0; $i < 4; ++$i) {
-            $hex = $high_part % 0x100;
-            $res .= pack('c', $hex);
-            $high_part /= 0x100;
+        $factor = 2 ** 56;
+        while ($factor >= 1) {
+            $hex = (int) floor($big_date / $factor);
+            $res = pack('c', $hex) . $res;
+            $big_date = fmod($big_date, $factor);
+            $factor /= 256;
         }

         return $res;