diff --git a/lib/net/authorize/api/controller/base/ApiOperationBase.php b/lib/net/authorize/api/controller/base/ApiOperationBase.php
index 9117389a..6192d9ca 100644
--- a/lib/net/authorize/api/controller/base/ApiOperationBase.php
+++ b/lib/net/authorize/api/controller/base/ApiOperationBase.php
@@ -48,7 +48,6 @@ abstract class ApiOperationBase implements IApiOperation
      */
     public function __construct(\net\authorize\api\contract\v1\AnetApiRequestType $request, $responseType)
     {
-        date_default_timezone_set('UTC');
         $this->logger = LogFactory::getLog(get_class($this));
 
         if ( null == $request)
diff --git a/lib/net/authorize/util/Helpers.php b/lib/net/authorize/util/Helpers.php
index bffdb79a..441826fd 100644
--- a/lib/net/authorize/util/Helpers.php
+++ b/lib/net/authorize/util/Helpers.php
@@ -19,7 +19,6 @@ public static function now()
         //init only once
         if ( ! self::$initialized)
         {
-            date_default_timezone_set('UTC');
             self::$initialized = true;
         }
         return date( DATE_RFC2822);
diff --git a/lib/net/authorize/util/HttpClient.php b/lib/net/authorize/util/HttpClient.php
index a779c92c..b0289632 100644
--- a/lib/net/authorize/util/HttpClient.php
+++ b/lib/net/authorize/util/HttpClient.php
@@ -23,7 +23,6 @@ class HttpClient
     public function __construct()
     {
         $this->logger = LogFactory::getLog(get_class($this));
-        date_default_timezone_set('UTC');
     }
 
     /**
diff --git a/tests/bootstrap.php b/tests/bootstrap.php
index 9815cac1..80757261 100644
--- a/tests/bootstrap.php
+++ b/tests/bootstrap.php
@@ -13,7 +13,6 @@
 }
 
 // Append to log file
-date_default_timezone_set('UTC'); //necessary for the following date to set timezone
 $logMessage = sprintf("Logging Started: %s\n", date(DATE_RFC2822));
 if (AUTHORIZENET_LOG_FILE)
 {