diff --git a/htdocs/core/class/commonobject.class.php b/htdocs/core/class/commonobject.class.php
index 67ceaf69446..ab4228769e1 100644
--- a/htdocs/core/class/commonobject.class.php
+++ b/htdocs/core/class/commonobject.class.php
@@ -2037,7 +2037,7 @@ abstract class CommonObject
 	 *	@param	mixed		$value			New value
 	 *	@param	string		$table			To force other table element or element line (should not be used)
 	 *	@param	int			$id				To force other object id (should not be used)
-	 *	@param	string		$format			Data format ('text', 'date'). 'text' is used if not defined
+	 *	@param	string		$format			Data format ('text', 'int', 'date'). 'text' is used if not defined
 	 *	@param	string		$id_field		To force rowid field name. 'rowid' is used if not defined
 	 *	@param	User|string	$fuser			Update the user of last update field with this user. If not provided, current user is used except if value is 'none'
 	 *  @param  string      $trigkey    	Trigger key to run (in most cases something like 'XXX_MODIFY')
@@ -2082,6 +2082,8 @@ abstract class CommonObject
 			$sql .= $field." = ".((int) $value);
 		} elseif ($format == 'date') {
 			$sql .= $field." = ".($value ? "'".$this->db->idate($value)."'" : "null");
+		} elseif ($format == 'dategmt') {
+			$sql .= $field." = ".($value ? "'".$this->db->idate($value, 'gmt')."'" : "null");
 		}
 
 		if ($fk_user_field) {
@@ -5340,7 +5342,7 @@ abstract class CommonObject
 		$sql .= ", busy";
 		$sql .= ", mandatory";
 		$sql .= ") VALUES (";
-		$sql .= $resource_id;
+		$sql .= ((int) $resource_id);
 		$sql .= ", '".$this->db->escape($resource_type)."'";
 		$sql .= ", '".$this->db->escape($this->id)."'";
 		$sql .= ", '".$this->db->escape($this->element)."'";
@@ -6325,6 +6327,13 @@ abstract class CommonObject
 						}
 						$new_array_options[$key] = $this->db->idate($this->array_options[$key]);
 						break;
+					case 'datetimegmt':
+						// If data is a string instead of a timestamp, we convert it
+						if (!is_numeric($this->array_options[$key]) || $this->array_options[$key] != intval($this->array_options[$key])) {
+							$this->array_options[$key] = strtotime($this->array_options[$key]);
+						}
+						$new_array_options[$key] = $this->db->idate($this->array_options[$key], 'gmt');
+						break;
 					case 'link':
 						$param_list = array_keys($attributeParam['options']);
 						// 0 : ObjectName
@@ -6665,6 +6674,13 @@ abstract class CommonObject
 						$this->array_options["options_".$key] = $this->db->idate($this->array_options["options_".$key]);
 					}
 					break;
+				case 'datetimegmt':
+					if (empty($this->array_options["options_".$key])) {
+						$this->array_options["options_".$key] = null;
+					} else {
+						$this->array_options["options_".$key] = $this->db->idate($this->array_options["options_".$key], 'gmt');
+					}
+					break;
 				case 'boolean':
 					if (empty($this->array_options["options_".$key])) {
 						$this->array_options["options_".$key] = null;
diff --git a/htdocs/core/class/extrafields.class.php b/htdocs/core/class/extrafields.class.php
index 8f8a3e54552..71d5dfdb06d 100644
--- a/htdocs/core/class/extrafields.class.php
+++ b/htdocs/core/class/extrafields.class.php
@@ -79,6 +79,7 @@ class ExtraFields
 		'double'=>'Float',
 		'date'=>'Date',
 		'datetime'=>'DateAndTime',
+		//'datetimegmt'=>'DateAndTimeUTC',
 		'boolean'=>'Boolean',
 		'price'=>'ExtrafieldPrice',
 		'pricecy'=>'ExtrafieldPriceWithCurrency',
@@ -979,7 +980,7 @@ class ExtraFields
 			// Add automatic css
 			if ($type == 'date') {
 				$morecss = 'minwidth100imp';
-			} elseif ($type == 'datetime' || $type == 'link') {
+			} elseif ($type == 'datetime' || $type == 'datetimegmt' || $type == 'link') {
 				$morecss = 'minwidth200imp';
 			} elseif (in_array($type, array('int', 'integer', 'double', 'price'))) {
 				$morecss = 'maxwidth75';
@@ -1031,7 +1032,7 @@ class ExtraFields
 				// TODO Must also support $moreparam
 				$out = $form->selectDate($value, $keyprefix.$key.$keysuffix, $showtime, $showtime, $required, '', 1, (($keyprefix != 'search_' && $keyprefix != 'search_options_') ? 1 : 0), 0, 1);
 			}
-		} elseif (in_array($type, array('datetime'))) {
+		} elseif (in_array($type, array('datetime', 'datetimegmt'))) {
 			$tmp = explode(',', $size);
 			$newsize = $tmp[0];
 			$showtime = 1;
@@ -1614,6 +1615,11 @@ class ExtraFields
 			if ($value !== '') {
 				$value = dol_print_date($value, 'dayhour', 'tzuserrel');
 			}
+		} elseif ($type == 'datetimegmt') {
+			$showsize = 19;
+			if ($value !== '') {
+				$value = dol_print_date($value, 'dayhour', 'gmt');
+			}
 		} elseif ($type == 'int') {
 			$showsize = 10;
 		} elseif ($type == 'double') {
@@ -1928,7 +1934,7 @@ class ExtraFields
 
 		$cssstring = '';
 
-		if (in_array($type, array('date', 'datetime'))) {
+		if (in_array($type, array('date', 'datetime', 'datetimegmt'))) {
 			$cssstring = "center";
 		} elseif (in_array($type, array('int', 'price', 'double'))) {
 			$cssstring = "right";
@@ -2137,6 +2143,9 @@ class ExtraFields
 				} elseif (in_array($key_type, array('datetime'))) {
 					// Clean parameters
 					$value_key = dol_mktime(GETPOST("options_".$key."hour", 'int'), GETPOST("options_".$key."min", 'int'), GETPOST("options_".$key."sec", 'int'), GETPOST("options_".$key."month", 'int'), GETPOST("options_".$key."day", 'int'), GETPOST("options_".$key."year", 'int'), 'tzuserrel');
+				} elseif (in_array($key_type, array('datetimegmt'))) {
+					// Clean parameters
+					$value_key = dol_mktime(GETPOST("options_".$key."hour", 'int'), GETPOST("options_".$key."min", 'int'), GETPOST("options_".$key."sec", 'int'), GETPOST("options_".$key."month", 'int'), GETPOST("options_".$key."day", 'int'), GETPOST("options_".$key."year", 'int'), 'gmt');
 				} elseif (in_array($key_type, array('checkbox', 'chkbxlst'))) {
 					$value_arr = GETPOST("options_".$key, 'array'); // check if an array
 					if (!empty($value_arr)) {
@@ -2228,7 +2237,7 @@ class ExtraFields
 					} else {
 						continue; // Value was not provided, we should not set it.
 					}
-				} elseif (in_array($key_type, array('datetime'))) {
+				} elseif (in_array($key_type, array('datetime', 'datetimegmt'))) {
 					$dateparamname_start = $keysuffix . 'options_' . $key . $keyprefix . '_start';
 					$dateparamname_end   = $keysuffix . 'options_' . $key . $keyprefix . '_end';
 					if (GETPOSTISSET($dateparamname_start . 'year') && GETPOSTISSET($dateparamname_end . 'year')) {
@@ -2236,13 +2245,24 @@ class ExtraFields
 						$dateparamname_end_hour = GETPOST($dateparamname_end . 'hour', 'int') !='-1' ? GETPOST($dateparamname_end . 'hour', 'int') : '23';
 						$dateparamname_end_min = GETPOST($dateparamname_end . 'min', 'int') !='-1' ? GETPOST($dateparamname_end . 'min', 'int') : '59';
 						$dateparamname_end_sec = GETPOST($dateparamname_end . 'sec', 'int') !='-1' ? GETPOST($dateparamname_end . 'sec', 'int') : '59';
-						$value_key = array(
-							'start' => dol_mktime(GETPOST($dateparamname_start . 'hour', 'int'), GETPOST($dateparamname_start . 'min', 'int'), GETPOST($dateparamname_start . 'sec', 'int'), GETPOST($dateparamname_start . 'month', 'int'), GETPOST($dateparamname_start . 'day', 'int'), GETPOST($dateparamname_start . 'year', 'int'), 'tzuserrel'),
-							'end' => dol_mktime($dateparamname_end_hour, $dateparamname_end_min, $dateparamname_end_sec, GETPOST($dateparamname_end . 'month', 'int'), GETPOST($dateparamname_end . 'day', 'int'), GETPOST($dateparamname_end . 'year', 'int'), 'tzuserrel')
-						);
+						if ($key_type == 'datetimegmt') {
+							$value_key = array(
+								'start' => dol_mktime(GETPOST($dateparamname_start . 'hour', 'int'), GETPOST($dateparamname_start . 'min', 'int'), GETPOST($dateparamname_start . 'sec', 'int'), GETPOST($dateparamname_start . 'month', 'int'), GETPOST($dateparamname_start . 'day', 'int'), GETPOST($dateparamname_start . 'year', 'int'), 'gmt'),
+								'end' => dol_mktime($dateparamname_end_hour, $dateparamname_end_min, $dateparamname_end_sec, GETPOST($dateparamname_end . 'month', 'int'), GETPOST($dateparamname_end . 'day', 'int'), GETPOST($dateparamname_end . 'year', 'int'), 'gmt')
+							);
+						} else {
+							$value_key = array(
+								'start' => dol_mktime(GETPOST($dateparamname_start . 'hour', 'int'), GETPOST($dateparamname_start . 'min', 'int'), GETPOST($dateparamname_start . 'sec', 'int'), GETPOST($dateparamname_start . 'month', 'int'), GETPOST($dateparamname_start . 'day', 'int'), GETPOST($dateparamname_start . 'year', 'int'), 'tzuserrel'),
+								'end' => dol_mktime($dateparamname_end_hour, $dateparamname_end_min, $dateparamname_end_sec, GETPOST($dateparamname_end . 'month', 'int'), GETPOST($dateparamname_end . 'day', 'int'), GETPOST($dateparamname_end . 'year', 'int'), 'tzuserrel')
+							);
+						}
 					} elseif (GETPOSTISSET($keysuffix."options_".$key.$keyprefix."year")) {
 						// Clean parameters
-						$value_key = dol_mktime(GETPOST($keysuffix."options_".$key.$keyprefix."hour", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."min", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."sec", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."month", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."day", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."year", 'int'), 'tzuserrel');
+						if ($key_type == 'datetimegmt') {
+							$value_key = dol_mktime(GETPOST($keysuffix."options_".$key.$keyprefix."hour", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."min", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."sec", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."month", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."day", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."year", 'int'), 'gmt');
+						} else {
+							$value_key = dol_mktime(GETPOST($keysuffix."options_".$key.$keyprefix."hour", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."min", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."sec", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."month", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."day", 'int'), GETPOST($keysuffix."options_".$key.$keyprefix."year", 'int'), 'tzuserrel');
+						}
 					} else {
 						continue; // Value was not provided, we should not set it.
 					}