diff --git a/src/node.cc b/src/node.cc
index 73746781983c78..032963bff41a69 100644
--- a/src/node.cc
+++ b/src/node.cc
@@ -80,7 +80,6 @@
 #include <stdlib.h>
 #include <string.h>
 #include <sys/types.h>
-#include <time.h>  // tzset(), _tzset()
 
 #include <string>
 #include <vector>
@@ -136,7 +135,6 @@ using v8::Array;
 using v8::ArrayBuffer;
 using v8::Boolean;
 using v8::Context;
-using v8::Date;
 using v8::EscapableHandleScope;
 using v8::Exception;
 using v8::Float64Array;
@@ -2690,10 +2688,6 @@ static void EnvSetter(Local<Name> property,
   node::Utf8Value key(info.GetIsolate(), property);
   node::Utf8Value val(info.GetIsolate(), value);
   setenv(*key, *val, 1);
-  if (key.length() == 2 && key[0] == 'T' && key[1] == 'Z') {
-    tzset();
-    Date::DateTimeConfigurationChangeNotification(info.GetIsolate());
-  }
 #else  // _WIN32
   node::TwoByteValue key(info.GetIsolate(), property);
   node::TwoByteValue val(info.GetIsolate(), value);
@@ -2702,10 +2696,6 @@ static void EnvSetter(Local<Name> property,
   if (key_ptr[0] != L'=') {
     SetEnvironmentVariableW(key_ptr, reinterpret_cast<WCHAR*>(*val));
   }
-  if (key.length() == 2 && key[0] == L'T' && key[1] == L'Z') {
-    _tzset();
-    Date::DateTimeConfigurationChangeNotification(info.GetIsolate());
-  }
 #endif
   // Whether it worked or not, always return value.
   info.GetReturnValue().Set(value);
diff --git a/test/parallel/test-process-env-tz.js b/test/parallel/test-process-env-tz.js
deleted file mode 100644
index 7e077588d46e64..00000000000000
--- a/test/parallel/test-process-env-tz.js
+++ /dev/null
@@ -1,23 +0,0 @@
-'use strict';
-
-const common = require('../common');
-const assert = require('assert');
-
-if (common.isWindows)  // Using a different TZ format.
-  common.skip('todo: test on Windows');
-
-if (common.isAIX || common.isSunOS)  // Reports 2018 CEST as CET.
-  common.skip('tzdata too old');
-
-const date = new Date('2018-04-14T12:34:56.789Z');
-
-process.env.TZ = 'Europe/Amsterdam';
-if (/\(Europe\)/.test(date.toString()))
-  common.skip('not using bundled ICU');  // Shared library or --with-intl=none.
-assert.strictEqual(date.toString(), 'Sat Apr 14 2018 14:34:56 GMT+0200 (CEST)');
-
-process.env.TZ = 'Europe/London';
-assert.strictEqual(date.toString(), 'Sat Apr 14 2018 13:34:56 GMT+0100 (BST)');
-
-process.env.TZ = 'Etc/UTC';
-assert.strictEqual(date.toString(), 'Sat Apr 14 2018 12:34:56 GMT+0000 (UTC)');