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diff --git a/web/core/modules/system/src/Plugin/migrate/process/d6/TimeZone.php b/web/core/modules/system/src/Plugin/migrate/process/d6/TimeZone.php
new file mode 100644
index 000000000..3dc88810d
--- /dev/null
+++ b/web/core/modules/system/src/Plugin/migrate/process/d6/TimeZone.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace Drupal\system\Plugin\migrate\process\d6;
+
+use Drupal\migrate\MigrateExecutableInterface;
+use Drupal\migrate\ProcessPluginBase;
+use Drupal\migrate\Row;
+
+/**
+ * Process the D6 Timezone offset into a D8 compatible timezone name.
+ *
+ * @MigrateProcessPlugin(
+ *   id = "timezone"
+ * )
+ */
+class TimeZone extends ProcessPluginBase {
+  /**
+   * {@inheritdoc}
+   */
+  public function transform($value, MigrateExecutableInterface $migrate_executable, Row $row, $destination_property) {
+    $offset = $value;
+    // Convert the integer value of the offset (which can be either
+    // negative or positive) to a timezone name.
+    // Note: Daylight saving time is not to be used.
+    $timezone_name = timezone_name_from_abbr('', intval($offset), 0);
+    if (!$timezone_name) {
+      $timezone_name = 'UTC';
+    }
+
+    return $timezone_name;
+  }
+
+}