From ec72aeae385d4c8078817beec099f3fa175a8998 Mon Sep 17 00:00:00 2001
From: Christopher Szu <cszu@proton.ch>
Date: Tue, 30 Aug 2022 11:18:48 +0800
Subject: [PATCH] Add mapping for CDT timezone

---
 lib/timezonedata/extrazones.php    | 1 +
 tests/VObject/TimeZoneUtilTest.php | 5 +++++
 2 files changed, 6 insertions(+)

diff --git a/lib/timezonedata/extrazones.php b/lib/timezonedata/extrazones.php
index 6a76a2a41..b684e9c99 100644
--- a/lib/timezonedata/extrazones.php
+++ b/lib/timezonedata/extrazones.php
@@ -202,4 +202,5 @@
     'Pacific/Johnston' => 'Pacific/Honolulu',
     'EDT' => 'America/Manaus',
     'America/Godthab' => 'Atlantic/Stanley',
+    'CDT' => 'America/Chicago',
 ];
diff --git a/tests/VObject/TimeZoneUtilTest.php b/tests/VObject/TimeZoneUtilTest.php
index c23dbcf00..fddf3de7e 100644
--- a/tests/VObject/TimeZoneUtilTest.php
+++ b/tests/VObject/TimeZoneUtilTest.php
@@ -434,6 +434,11 @@ public function unSupportTimezoneProvider(): iterable
             'expected' => 'America/Manaus',
         ];
 
+        yield 'CDT' => [
+            'origin' => 'CDT',
+            'expected' => 'America/Chicago',
+        ];
+
         if (($handle = fopen(__DIR__ . "/microsoft-timezones-confluence.csv", "r")) !== FALSE) {
             $data = fgetcsv($handle);
             while (($data = fgetcsv($handle)) !== FALSE) {