diff --git a/core/modules/system/system.install b/core/modules/system/system.install
index 5dde386..e77caf6 100644
--- a/core/modules/system/system.install
+++ b/core/modules/system/system.install
@@ -904,12 +904,12 @@ function system_requirements($phase) {
     }
   }
 
-  // Check to see if dates will be limited to 1970-2038.
+  // Check to see if dates will be limited to 1901-2038.
   if (PHP_INT_SIZE === 4) {
     $requirements['limited_date_range'] = [
       'title' => t('Limited Date Range'),
       'value' => t('Your PHP installation has a limited date range.'),
-      'description' => t('You are running on a system where PHP is compiled or limited to using 32-bit integers. This will limit the range of dates and timestamps to the years 1970-2038.'),
+      'description' => t('You are running on a system where PHP is compiled or limited to using 32-bit integers. This will limit the range of dates and timestamps to the years 1901-2038.'),
       'severity' => REQUIREMENT_INFO,
     ];
   }
diff --git a/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php b/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php
index 1e10a75..7dcb0a5 100644
--- a/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php
+++ b/core/tests/Drupal/Tests/Component/Datetime/DateTimePlusTest.php
@@ -309,7 +309,7 @@ public function providerTestDates() {
       array('2009-06-07 10:30', 'Australia/Canberra', '2009-06-07T10:30:00+10:00'),
     );
 
-    // On 32-bit systems, timestamps are limited to 1970-2038.
+    // On 32-bit systems, timestamps are limited to 1901-2038.
     if (PHP_INT_SIZE !== 4) {
       // Create a date object in the distant past.
       $dates[] = array('1809-02-12 10:30', 'America/Chicago', '1809-02-12T10:30:00-06:00');