diff --git a/boot.php b/boot.php
index b3743ab991..004ebf3ade 100644
--- a/boot.php
+++ b/boot.php
@@ -32,7 +32,6 @@ use Friendica\Model\Contact;
 use Friendica\Util\DateTimeFormat;
 
 require_once 'include/text.php';
-require_once 'include/datetime.php';
 
 define('FRIENDICA_PLATFORM',     'Friendica');
 define('FRIENDICA_CODENAME',     'Asparagus');
diff --git a/include/api.php b/include/api.php
index 96a935614d..e50bc92a8e 100644
--- a/include/api.php
+++ b/include/api.php
@@ -41,7 +41,6 @@ use Friendica\Util\Network;
 use Friendica\Util\XML;
 
 require_once 'include/bbcode.php';
-require_once 'include/datetime.php';
 require_once 'include/conversation.php';
 require_once 'include/html2plain.php';
 require_once 'mod/share.php';
diff --git a/include/dba.php b/include/dba.php
index f6bab9e3c5..1407c1c6f5 100644
--- a/include/dba.php
+++ b/include/dba.php
@@ -6,8 +6,6 @@ use Friendica\Database\DBM;
 use Friendica\Database\DBStructure;
 use Friendica\Util\DateTimeFormat;
 
-require_once('include/datetime.php');
-
 /**
  * @class MySQL database class
  *
diff --git a/include/event.php b/include/event.php
index 647697e5a0..30ba1cfde2 100644
--- a/include/event.php
+++ b/include/event.php
@@ -16,7 +16,6 @@ use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Map;
 
 require_once 'include/bbcode.php';
-require_once 'include/datetime.php';
 require_once 'include/conversation.php';
 
 function format_event_html($ev, $simple = false) {
@@ -238,7 +237,6 @@ function event_delete($event_id) {
  */
 function event_store($arr) {
 
-	require_once 'include/datetime.php';
 	require_once 'include/items.php';
 	require_once 'include/bbcode.php';
 
diff --git a/mod/events.php b/mod/events.php
index 2ff97e9fd6..0b8938631f 100644
--- a/mod/events.php
+++ b/mod/events.php
@@ -16,7 +16,6 @@ use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Temporal;
 
 require_once 'include/bbcode.php';
-require_once 'include/datetime.php';
 require_once 'include/event.php';
 require_once 'include/items.php';
 
diff --git a/mod/install.php b/mod/install.php
index 1ddc8fbad1..f3969a6f24 100644
--- a/mod/install.php
+++ b/mod/install.php
@@ -253,7 +253,6 @@ function install_content(App $a) {
 			return $o;
 		}; break;
 		case 3: { // Site settings
-			require_once('include/datetime.php');
 			$dbhost = ((x($_POST, 'dbhost')) ? notags(trim($_POST['dbhost'])) : 'localhost');
 			$dbuser = notags(trim($_POST['dbuser']));
 			$dbpass = notags(trim($_POST['dbpass']));
diff --git a/mod/localtime.php b/mod/localtime.php
index fd1ef33a95..b10f1571a0 100644
--- a/mod/localtime.php
+++ b/mod/localtime.php
@@ -9,8 +9,6 @@ use Friendica\Core\System;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Temporal;
 
-require_once 'include/datetime.php';
-
 function localtime_post(App $a)
 {
 	$t = $_REQUEST['time'];
diff --git a/mod/lostpass.php b/mod/lostpass.php
index 75d29731be..73167e6fe0 100644
--- a/mod/lostpass.php
+++ b/mod/lostpass.php
@@ -11,7 +11,6 @@ use Friendica\Model\User;
 use Friendica\Util\DateTimeFormat;
 
 require_once 'boot.php';
-require_once 'include/datetime.php';
 require_once 'include/enotify.php';
 require_once 'include/text.php';
 
diff --git a/mod/ping.php b/mod/ping.php
index 87053395c1..1bb8f147f9 100644
--- a/mod/ping.php
+++ b/mod/ping.php
@@ -18,7 +18,6 @@ use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Temporal;
 use Friendica\Util\XML;
 
-require_once 'include/datetime.php';
 require_once 'include/bbcode.php';
 require_once 'mod/proxy.php';
 require_once 'include/enotify.php';
diff --git a/mod/wall_attach.php b/mod/wall_attach.php
index 30bc9641f7..07092cf180 100644
--- a/mod/wall_attach.php
+++ b/mod/wall_attach.php
@@ -10,8 +10,6 @@ use Friendica\Database\DBM;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Mimetype;
 
-require_once 'include/datetime.php';
-
 function wall_attach_post(App $a) {
 
 	$r_json = (x($_GET,'response') && $_GET['response']=='json');
diff --git a/src/Core/NotificationsManager.php b/src/Core/NotificationsManager.php
index 5cbd567a95..ed12a89141 100644
--- a/src/Core/NotificationsManager.php
+++ b/src/Core/NotificationsManager.php
@@ -19,7 +19,6 @@ use Friendica\Util\XML;
 
 require_once 'include/dba.php';
 require_once 'include/html2plain.php';
-require_once 'include/datetime.php';
 require_once 'include/bbcode.php';
 
 /**
diff --git a/src/Model/GContact.php b/src/Model/GContact.php
index 5e75ba5a54..e543e4baeb 100644
--- a/src/Model/GContact.php
+++ b/src/Model/GContact.php
@@ -19,7 +19,6 @@ use Friendica\Util\Network;
 use dba;
 use Exception;
 
-require_once 'include/datetime.php';
 require_once 'include/dba.php';
 require_once 'include/html2bbcode.php';
 
diff --git a/src/Model/Mail.php b/src/Model/Mail.php
index f9b4c4d6db..b2e9e1a487 100644
--- a/src/Model/Mail.php
+++ b/src/Model/Mail.php
@@ -14,7 +14,6 @@ use Friendica\Util\DateTimeFormat;
 use dba;
 
 require_once 'include/dba.php';
-require_once 'include/datetime.php';
 
 /**
  * Class to handle private messages
diff --git a/src/Model/Process.php b/src/Model/Process.php
index c360a13d09..75d898065c 100644
--- a/src/Model/Process.php
+++ b/src/Model/Process.php
@@ -9,7 +9,6 @@ use Friendica\Util\DateTimeFormat;
 use dba;
 
 require_once 'include/dba.php';
-require_once 'include/datetime.php';
 
 /**
  * @brief functions for interacting with a process
diff --git a/src/Model/Queue.php b/src/Model/Queue.php
index da7a8b3e58..3c3cf379a4 100644
--- a/src/Model/Queue.php
+++ b/src/Model/Queue.php
@@ -10,7 +10,6 @@ use Friendica\Util\DateTimeFormat;
 use dba;
 
 require_once 'include/dba.php';
-require_once 'include/datetime.php';
 
 class Queue
 {
diff --git a/src/Module/Login.php b/src/Module/Login.php
index 53ab57585f..b0b5a4947d 100644
--- a/src/Module/Login.php
+++ b/src/Module/Login.php
@@ -17,7 +17,6 @@ use Exception;
 use LightOpenID;
 
 require_once 'boot.php';
-require_once 'include/datetime.php';
 require_once 'include/security.php';
 require_once 'include/text.php';
 
diff --git a/src/Protocol/Diaspora.php b/src/Protocol/Diaspora.php
index 1e5c5345f6..bd66f487ac 100644
--- a/src/Protocol/Diaspora.php
+++ b/src/Protocol/Diaspora.php
@@ -34,7 +34,6 @@ use SimpleXMLElement;
 require_once 'include/dba.php';
 require_once 'include/items.php';
 require_once 'include/bb2diaspora.php';
-require_once 'include/datetime.php';
 
 /**
  * @brief This class contain functions to create and send Diaspora XML files
diff --git a/src/Protocol/PortableContact.php b/src/Protocol/PortableContact.php
index 7f351ed059..7c1015c9aa 100644
--- a/src/Protocol/PortableContact.php
+++ b/src/Protocol/PortableContact.php
@@ -23,7 +23,6 @@ use DOMXPath;
 use Exception;
 
 require_once 'include/dba.php';
-require_once 'include/datetime.php';
 require_once 'include/html2bbcode.php';
 
 class PortableContact
diff --git a/src/Worker/Cron.php b/src/Worker/Cron.php
index 7c8e5bc0f4..ad7b4b7f1a 100644
--- a/src/Worker/Cron.php
+++ b/src/Worker/Cron.php
@@ -17,8 +17,6 @@ Class Cron {
 	public static function execute($parameter = '', $generation = 0) {
 		global $a;
 
-		require_once 'include/datetime.php';
-
 		// Poll contacts with specific parameters
 		if (!empty($parameter)) {
 			self::pollContacts($parameter, $generation);
diff --git a/src/Worker/CronHooks.php b/src/Worker/CronHooks.php
index cf5759e598..2bbe529ba9 100644
--- a/src/Worker/CronHooks.php
+++ b/src/Worker/CronHooks.php
@@ -14,8 +14,6 @@ Class CronHooks {
 	public static function execute($hook = '') {
 		global $a;
 
-		require_once 'include/datetime.php';
-
 		if (($hook != '') && is_array($a->hooks) && array_key_exists("cron", $a->hooks)) {
 			foreach ($a->hooks["cron"] as $single_hook) {
 				if ($single_hook[1] == $hook) {
diff --git a/src/Worker/CronJobs.php b/src/Worker/CronJobs.php
index 6dc028ea0e..06e5c61433 100644
--- a/src/Worker/CronJobs.php
+++ b/src/Worker/CronJobs.php
@@ -25,7 +25,6 @@ class CronJobs
 	{
 		global $a;
 
-		require_once 'include/datetime.php';
 		require_once 'mod/nodeinfo.php';
 
 		// No parameter set? So return
diff --git a/src/Worker/Delivery.php b/src/Worker/Delivery.php
index 1a299b072f..0a77f7b5be 100644
--- a/src/Worker/Delivery.php
+++ b/src/Worker/Delivery.php
@@ -18,7 +18,6 @@ use Friendica\Protocol\Email;
 use dba;
 
 require_once 'include/html2plain.php';
-require_once 'include/datetime.php';
 require_once 'include/items.php';
 require_once 'include/bbcode.php';
 
diff --git a/src/Worker/DiscoverPoCo.php b/src/Worker/DiscoverPoCo.php
index b3f4dab786..a5e1e6ee2d 100644
--- a/src/Worker/DiscoverPoCo.php
+++ b/src/Worker/DiscoverPoCo.php
@@ -14,8 +14,6 @@ use Friendica\Protocol\PortableContact;
 use Friendica\Util\DateTimeFormat;
 use Friendica\Util\Network;
 
-require_once 'include/datetime.php';
-
 class DiscoverPoCo {
 	/// @todo Clean up this mess of a parameter hell and split it in several classes
 	public static function execute($command = '', $param1 = '', $param2 = '', $param3 = '', $param4 = '')
diff --git a/src/Worker/Expire.php b/src/Worker/Expire.php
index ce614e377c..cf6e78cb72 100644
--- a/src/Worker/Expire.php
+++ b/src/Worker/Expire.php
@@ -19,7 +19,6 @@ class Expire {
 	public static function execute($param = '', $hook_name = '') {
 		global $a;
 
-		require_once 'include/datetime.php';
 		require_once 'include/items.php';
 
 		Addon::loadHooks();
diff --git a/src/Worker/GProbe.php b/src/Worker/GProbe.php
index bd209b5782..d6c0ae122d 100644
--- a/src/Worker/GProbe.php
+++ b/src/Worker/GProbe.php
@@ -11,8 +11,6 @@ use Friendica\Model\GContact;
 use Friendica\Network\Probe;
 use Friendica\Protocol\PortableContact;
 
-require_once 'include/datetime.php';
-
 class GProbe {
 	public static function execute($url = '')
 	{
diff --git a/src/Worker/Notifier.php b/src/Worker/Notifier.php
index f28b8c68a1..2dc5dca581 100644
--- a/src/Worker/Notifier.php
+++ b/src/Worker/Notifier.php
@@ -19,7 +19,6 @@ use dba;
 
 require_once 'include/dba.php';
 require_once 'include/html2plain.php';
-require_once 'include/datetime.php';
 require_once 'include/items.php';
 require_once 'include/bbcode.php';
 
diff --git a/src/Worker/OnePoll.php b/src/Worker/OnePoll.php
index f8ea311c29..42c2774faa 100644
--- a/src/Worker/OnePoll.php
+++ b/src/Worker/OnePoll.php
@@ -24,7 +24,6 @@ class OnePoll
 	public static function execute($contact_id = 0, $command = '') {
 		global $a;
 
-		require_once 'include/datetime.php';
 		require_once 'include/items.php';
 
 		logger('start');
diff --git a/src/Worker/Queue.php b/src/Worker/Queue.php
index e73018f517..10a83e5c4b 100644
--- a/src/Worker/Queue.php
+++ b/src/Worker/Queue.php
@@ -16,7 +16,6 @@ use Friendica\Protocol\Salmon;
 use dba;
 
 require_once 'include/dba.php';
-require_once 'include/datetime.php';
 require_once 'include/items.php';
 require_once 'include/bbcode.php';