diff --git a/src/NodaTimeSplitter.php b/src/NodaTimeSplitter.php
index 5e50b5f..3221980 100644
--- a/src/NodaTimeSplitter.php
+++ b/src/NodaTimeSplitter.php
@@ -545,18 +545,18 @@ final class NodaTimeSplitter {
 
         // 10000-20000
         if (!empty(\preg_match("/^[0-9]{5}(\-|\/)[0-9]{5}$/", $datum))) {
-            return new NodaSplitTime(start_year: \substr($datum, 0, 5), end_year: \substr($datum, 6, 5));
+            return new NodaSplitTime(start_year: \substr($datum, 0, 5), end_year: \substr($datum, -5));
         }
 
         // 0000-0000
         if (\preg_match("/^[0-9]{4}(\-|\/|\–)[0-9]{4}(\.|)$/", $datum)) {
-            return new NodaSplitTime(start_year: \substr($datum, 0, 4), end_year: \substr($datum, 5, 4));
+            return new NodaSplitTime(start_year: \substr($datum, 0, 4), end_year: \substr($datum, -4));
         }
 
         // 1.900-2.000
         if (\preg_match("/^[0-9]\.[0-9][0-9][0-9](\-|\/|\–)[0-9]\.[0-9][0-9][0-9]$/", $datum)) {
             $datum = \str_replace(".", "", $datum);
-            return new NodaSplitTime(start_year: \substr($datum, 0, 4), end_year: \substr($datum, 5, 4));
+            return new NodaSplitTime(start_year: \substr($datum, 0, 4), end_year: \substr($datum, -4));
         }
 
         // German TT.MM.JJJJ  /  TT.MM.JJJ  /  TT.MM.JJ  /  TT.MM.J
@@ -601,7 +601,7 @@ final class NodaTimeSplitter {
         // Intl': 2020-12
         if (\preg_match("/^[0-9]{4}\-[0-9]{2}$/", $datum)) { // German Y-m or 1912-15
             $year = \substr($datum, 0, 4);
-            $month = \substr($datum, 5, 2);
+            $month = \substr($datum, -2);
 
             // Assume the end is a month
             if (intval($month) < 12) {
diff --git a/tests/NodaTimeSplitterTest.php b/tests/NodaTimeSplitterTest.php
index d02f6f0..0c90238 100644
--- a/tests/NodaTimeSplitterTest.php
+++ b/tests/NodaTimeSplitterTest.php
@@ -164,7 +164,7 @@ final class NodaTimeSplitterTest extends TestCase {
                 new NodaSplitTime('1930', '2017',
                     start_date: '1930-01-01',
                     end_date: '2017-12-31'),
-                "1930–2017",
+                "1930-2017",
             ],
         ];