diff --git a/src/MD_STD.php b/src/MD_STD.php
index 5293da4..00b0e05 100644
--- a/src/MD_STD.php
+++ b/src/MD_STD.php
@@ -939,12 +939,11 @@ final class MD_STD {
      */
     public static function date_to_int(string $date):int {
 
-        // Edge case: -0000-01-01
-        if (substr($date, 0, 5) === '-0000') {
-            return -1 * intval(str_replace("-", "", ltrim($date, "0-")));
-        }
+        $isNegative = substr($date, 0, 1) === '-';
+        $parts = explode('-', $date);
 
-        return intval(date("Ymd", self::strtotime($date)));
+        if ($isNegative === true) return -1 * intval(implode($parts));
+        else return intval(implode($parts));
 
     }
 
@@ -973,7 +972,7 @@ final class MD_STD {
 
         $day = substr($dateStr, -2, 2);
         $month = substr($dateStr, -4, 2);
-        $year = substr($dateStr, -8, 4);
+        $year = substr($dateStr, 0, -4);
 
         return match($isNegative) {
             true => '-',
diff --git a/tests/MD_STD_Test.php b/tests/MD_STD_Test.php
index 84c6650..754236c 100644
--- a/tests/MD_STD_Test.php
+++ b/tests/MD_STD_Test.php
@@ -27,8 +27,8 @@ final class MD_STD_Test extends TestCase {
             ["-0022-01-01", -220101],
             ["-2022-01-01", -20220101],
             ["-0001-01-01", -10101],
-            ["-0000-01-01", -101],
             ["0000-01-01", 101],
+            ["100000-01-01", 1000000101],
         ];
 
         $output = [];