diff --git a/main/inc/lib/internationalization.lib.php b/main/inc/lib/internationalization.lib.php
index 1804152714..70505c2212 100644
--- a/main/inc/lib/internationalization.lib.php
+++ b/main/inc/lib/internationalization.lib.php
@@ -509,11 +509,8 @@ function api_detect_language(&$string, $encoding = null) {
  *
  * @author Guillaume Viguier <guillaume.viguier@beeznest.com>
  */
-function api_get_timezones() {
-    if (!DATE_TIME_INSTALLED) {
-        // This occurs when PHP < 5.2
-        return array('' => '');
-    }
+function api_get_timezones()
+{
     $timezone_identifiers = DateTimeZone::listIdentifiers();
     sort($timezone_identifiers);
     $out = array();
@@ -575,10 +572,6 @@ function api_get_utc_datetime($time = null, $return_null_if_invalid_date = false
         $time = intval($time);
         return gmdate('Y-m-d H:i:s', $time);
     }
-    if (!DATE_TIME_INSTALLED) {
-        // This occurs when PHP < 5.2
-        return $time;
-    }
     try {
         $date = new DateTime($time, new DateTimezone($from_timezone));
         $date->setTimezone(new DateTimeZone($to_timezone));
@@ -591,25 +584,16 @@ function api_get_utc_datetime($time = null, $return_null_if_invalid_date = false
 /**
  * Returns a DATETIME string converted to the right timezone
  * @param mixed The time to be converted
- * @param string The timezone to be converted to. If null, the timezone will be determined based on user preference, or timezone chosen by the admin for the platform.
+ * @param string The timezone to be converted to.
+ * If null, the timezone will be determined based on user preference,
+ * or timezone chosen by the admin for the platform.
  * @param string The timezone to be converted from. If null, UTC will be assumed.
  * @return string The converted time formatted as Y-m-d H:i:s
  *
  * @author Guillaume Viguier <guillaume.viguier@beeznest.com>
  */
-function api_get_local_time($time = null, $to_timezone = null, $from_timezone = null, $return_null_if_invalid_date = false) {
-    if (!DATE_TIME_INSTALLED) {
-        // This occurs when PHP < 5.2
-        if (is_null($time) || empty($time) || $time == '0000-00-00 00:00:00') {
-
-            $time = time();
-        }
-        if (is_numeric($time)) {
-            $time = intval($time);
-            $time = date('Y-m-d H:i:s', $time);
-        }
-        return $time;
-    }
+function api_get_local_time($time = null, $to_timezone = null, $from_timezone = null, $return_null_if_invalid_date = false)
+{
     // Determining the timezone to be converted from
     if (is_null($from_timezone)) {
         $from_timezone = 'UTC';