diff --git a/htdocs/adherents/card_subscriptions.php b/htdocs/adherents/card_subscriptions.php
index e9e065125b7..445c7d302c2 100644
--- a/htdocs/adherents/card_subscriptions.php
+++ b/htdocs/adherents/card_subscriptions.php
@@ -25,7 +25,7 @@
 
 require("../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/member.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/adherents/class/adherent.class.php");
 require_once(DOL_DOCUMENT_ROOT."/adherents/class/adherent_type.class.php");
 require_once(DOL_DOCUMENT_ROOT."/adherents/class/cotisation.class.php");
diff --git a/htdocs/adherents/class/adherent.class.php b/htdocs/adherents/class/adherent.class.php
index abb0f0c2882..5f2bee45e27 100644
--- a/htdocs/adherents/class/adherent.class.php
+++ b/htdocs/adherents/class/adherent.class.php
@@ -29,7 +29,7 @@
 require_once(DOL_DOCUMENT_ROOT."/core/class/commonobject.class.php");
 require_once(DOL_DOCUMENT_ROOT."/adherents/class/cotisation.class.php");
 require_once(DOL_DOCUMENT_ROOT."/core/lib/functions2.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 
 /**
diff --git a/htdocs/admin/agenda_extsites.php b/htdocs/admin/agenda_extsites.php
index 6426c4f6c7a..ef059cbf9a7 100644
--- a/htdocs/admin/agenda_extsites.php
+++ b/htdocs/admin/agenda_extsites.php
@@ -27,7 +27,7 @@ require_once(DOL_DOCUMENT_ROOT."/lib/admin.lib.php");
 require_once(DOL_DOCUMENT_ROOT.'/core/class/html.formadmin.class.php');
 require_once(DOL_DOCUMENT_ROOT.'/core/class/html.formother.class.php');
 require_once(DOL_DOCUMENT_ROOT."/lib/agenda.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 if (!$user->admin)
     accessforbidden();
diff --git a/htdocs/admin/company.php b/htdocs/admin/company.php
index 76dd1dd6780..bca3360c3e8 100644
--- a/htdocs/admin/company.php
+++ b/htdocs/admin/company.php
@@ -27,7 +27,7 @@
 require("../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/admin.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/company.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/core/lib/images.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/core/lib/functions2.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/core/class/html.formother.class.php");
diff --git a/htdocs/admin/system/dolibarr.php b/htdocs/admin/system/dolibarr.php
index 31bdfcaf388..5b577d19a7d 100644
--- a/htdocs/admin/system/dolibarr.php
+++ b/htdocs/admin/system/dolibarr.php
@@ -23,7 +23,7 @@
 
 require("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/core/lib/memory.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 $langs->load("admin");
 $langs->load("install");
diff --git a/htdocs/comm/action/class/actioncomm.class.php b/htdocs/comm/action/class/actioncomm.class.php
index a6672adfa93..0b79eca3148 100644
--- a/htdocs/comm/action/class/actioncomm.class.php
+++ b/htdocs/comm/action/class/actioncomm.class.php
@@ -666,7 +666,7 @@ class ActionComm extends CommonObject
 		global $conf,$langs,$dolibarr_main_url_root,$mysoc;
 
 		require_once (DOL_DOCUMENT_ROOT ."/lib/xcal.lib.php");
-		require_once (DOL_DOCUMENT_ROOT ."/lib/date.lib.php");
+		require_once (DOL_DOCUMENT_ROOT ."/core/lib/date.lib.php");
 
 		dol_syslog(get_class($this)."::build_exportfile Build export file format=".$format.", type=".$type.", cachedelay=".$cachedelay.", filename=".$filename.", filters size=".count($filters), LOG_DEBUG);
 
diff --git a/htdocs/comm/action/index.php b/htdocs/comm/action/index.php
index 700c5569916..04206aa10a3 100644
--- a/htdocs/comm/action/index.php
+++ b/htdocs/comm/action/index.php
@@ -29,7 +29,7 @@ require("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/societe/class/societe.class.php");
 require_once(DOL_DOCUMENT_ROOT."/contact/class/contact.class.php");
 require_once(DOL_DOCUMENT_ROOT."/comm/action/class/actioncomm.class.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/agenda.lib.php");
 if ($conf->projet->enabled) require_once(DOL_DOCUMENT_ROOT."/lib/project.lib.php");
 
diff --git a/htdocs/comm/action/listactions.php b/htdocs/comm/action/listactions.php
index 54aed0cbd15..d5f27126969 100644
--- a/htdocs/comm/action/listactions.php
+++ b/htdocs/comm/action/listactions.php
@@ -27,7 +27,7 @@
 require("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/contact/class/contact.class.php");
 require_once(DOL_DOCUMENT_ROOT."/comm/action/class/actioncomm.class.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/agenda.lib.php");
 if ($conf->projet->enabled) require_once(DOL_DOCUMENT_ROOT."/lib/project.lib.php");
 
diff --git a/htdocs/comm/fiche.php b/htdocs/comm/fiche.php
index 67396ee432e..7f83244c5fb 100644
--- a/htdocs/comm/fiche.php
+++ b/htdocs/comm/fiche.php
@@ -29,7 +29,7 @@
 
 require("../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/company.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/contact/class/contact.class.php");
 if ($conf->facture->enabled) require_once(DOL_DOCUMENT_ROOT."/compta/facture/class/facture.class.php");
 if ($conf->propal->enabled) require_once(DOL_DOCUMENT_ROOT."/comm/propal/class/propal.class.php");
diff --git a/htdocs/compta/charges/index.php b/htdocs/compta/charges/index.php
index 2c358e51edc..dd2f719f360 100644
--- a/htdocs/compta/charges/index.php
+++ b/htdocs/compta/charges/index.php
@@ -27,7 +27,7 @@ require("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/compta/tva/class/tva.class.php");
 require_once(DOL_DOCUMENT_ROOT."/compta/sociales/class/chargesociales.class.php");
 require_once(DOL_DOCUMENT_ROOT."/compta/sociales/class/paymentsocialcontribution.class.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 $langs->load("compta");
 
diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index e8a07835aa0..7926805d3bc 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -36,7 +36,7 @@ require_once(DOL_DOCUMENT_ROOT.'/core/class/discount.class.php');
 require_once(DOL_DOCUMENT_ROOT.'/compta/paiement/class/paiement.class.php');
 require_once(DOL_DOCUMENT_ROOT."/core/lib/functions2.lib.php");
 require_once(DOL_DOCUMENT_ROOT.'/lib/invoice.lib.php');
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 if ($conf->projet->enabled)   require_once(DOL_DOCUMENT_ROOT.'/projet/class/project.class.php');
 if ($conf->projet->enabled)   require_once(DOL_DOCUMENT_ROOT.'/lib/project.lib.php');
 
diff --git a/htdocs/compta/facture/class/facturestats.class.php b/htdocs/compta/facture/class/facturestats.class.php
index c4fc13c00a5..4335d21855f 100644
--- a/htdocs/compta/facture/class/facturestats.class.php
+++ b/htdocs/compta/facture/class/facturestats.class.php
@@ -25,7 +25,7 @@
 include_once DOL_DOCUMENT_ROOT . "/core/class/stats.class.php";
 include_once DOL_DOCUMENT_ROOT . "/compta/facture/class/facture.class.php";
 include_once DOL_DOCUMENT_ROOT . "/fourn/class/fournisseur.facture.class.php";
-include_once DOL_DOCUMENT_ROOT . "/lib/date.lib.php";
+include_once DOL_DOCUMENT_ROOT . "/core/lib/date.lib.php";
 
 /**
  *       \class      FactureStats
diff --git a/htdocs/compta/journal/purchasesjournal.php b/htdocs/compta/journal/purchasesjournal.php
index 66964796dae..c9efde9acb6 100755
--- a/htdocs/compta/journal/purchasesjournal.php
+++ b/htdocs/compta/journal/purchasesjournal.php
@@ -24,7 +24,7 @@
  */
 require("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/report.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/fourn/class/fournisseur.facture.class.php");
 
 $langs->load("companies");
diff --git a/htdocs/compta/journal/sellsjournal.php b/htdocs/compta/journal/sellsjournal.php
index 1ead0d71a72..602949ec724 100755
--- a/htdocs/compta/journal/sellsjournal.php
+++ b/htdocs/compta/journal/sellsjournal.php
@@ -24,7 +24,7 @@
  */
 require("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/report.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/compta/facture/class/facture.class.php");
 
 
diff --git a/htdocs/compta/resultat/clientfourn.php b/htdocs/compta/resultat/clientfourn.php
index 04557e00b8b..8b40189a080 100644
--- a/htdocs/compta/resultat/clientfourn.php
+++ b/htdocs/compta/resultat/clientfourn.php
@@ -27,7 +27,7 @@ require_once(DOL_DOCUMENT_ROOT."/compta/tva/class/tva.class.php");
 require_once(DOL_DOCUMENT_ROOT."/compta/sociales/class/chargesociales.class.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/report.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/tax.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 
 $langs->load("bills");
diff --git a/htdocs/compta/stats/cabyuser.php b/htdocs/compta/stats/cabyuser.php
index 7ad351bb118..4a123777bd4 100644
--- a/htdocs/compta/stats/cabyuser.php
+++ b/htdocs/compta/stats/cabyuser.php
@@ -25,7 +25,7 @@
 require('../../main.inc.php');
 require_once(DOL_DOCUMENT_ROOT."/lib/report.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/tax.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 // Security check
 $socid = isset($_REQUEST["socid"])?$_REQUEST["socid"]:'';
diff --git a/htdocs/compta/stats/casoc.php b/htdocs/compta/stats/casoc.php
index 5b26de3791b..edeea1495ec 100644
--- a/htdocs/compta/stats/casoc.php
+++ b/htdocs/compta/stats/casoc.php
@@ -26,7 +26,7 @@
 require('../../main.inc.php');
 require_once(DOL_DOCUMENT_ROOT."/lib/report.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/tax.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 $langs->load("companies");
 
diff --git a/htdocs/compta/tva/clients.php b/htdocs/compta/tva/clients.php
index 46f2c91caf4..6f9f1ad981e 100644
--- a/htdocs/compta/tva/clients.php
+++ b/htdocs/compta/tva/clients.php
@@ -27,7 +27,7 @@
 require('../../main.inc.php');
 require_once(DOL_DOCUMENT_ROOT."/lib/report.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/tax.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/compta/tva/class/tva.class.php");
 
 $langs->load("bills");
diff --git a/htdocs/compta/tva/index.php b/htdocs/compta/tva/index.php
index a84d800164a..f4819240fe1 100644
--- a/htdocs/compta/tva/index.php
+++ b/htdocs/compta/tva/index.php
@@ -26,7 +26,7 @@
 require('../../main.inc.php');
 require_once(DOL_DOCUMENT_ROOT."/lib/tax.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/compta/tva/class/tva.class.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 $langs->load("other");
 
diff --git a/htdocs/compta/tva/quadri_detail.php b/htdocs/compta/tva/quadri_detail.php
index 6a16a19ce73..d3348cfbf08 100644
--- a/htdocs/compta/tva/quadri_detail.php
+++ b/htdocs/compta/tva/quadri_detail.php
@@ -28,7 +28,7 @@
 require('../../main.inc.php');
 require_once(DOL_DOCUMENT_ROOT."/lib/report.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/tax.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/compta/tva/class/tva.class.php");
 require_once(DOL_DOCUMENT_ROOT."/compta/facture/class/facture.class.php");
 require_once(DOL_DOCUMENT_ROOT."/product/class/product.class.php");
diff --git a/htdocs/contact/perso.php b/htdocs/contact/perso.php
index 7de2f333936..2c37327330b 100644
--- a/htdocs/contact/perso.php
+++ b/htdocs/contact/perso.php
@@ -199,7 +199,7 @@ else
     // Date To Birth
     if ($contact->birthday != '')
     {
-        include_once(DOL_DOCUMENT_ROOT.'/lib/date.lib.php');
+        include_once(DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php');
 
         print '<tr><td>'.$langs->trans("DateToBirth").'</td><td colspan="3">'.dol_print_date($contact->birthday,"day");
 
diff --git a/htdocs/contrat/fiche.php b/htdocs/contrat/fiche.php
index 6710aa0f0bf..4f95788c0dc 100644
--- a/htdocs/contrat/fiche.php
+++ b/htdocs/contrat/fiche.php
@@ -26,7 +26,7 @@
  */
 
 require ("../main.inc.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT.'/lib/contract.lib.php');
 require_once(DOL_DOCUMENT_ROOT."/includes/modules/contract/modules_contract.php");
 if ($conf->projet->enabled)  require_once(DOL_DOCUMENT_ROOT."/projet/class/project.class.php");
diff --git a/htdocs/core/class/html.form.class.php b/htdocs/core/class/html.form.class.php
index 6e7de839e06..c7e2d98c8f1 100644
--- a/htdocs/core/class/html.form.class.php
+++ b/htdocs/core/class/html.form.class.php
@@ -3238,7 +3238,7 @@ class Form
     {
         if ($iSecond)
         {
-            require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+            require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
             $hourSelected = ConvertSecondToTime($iSecond,'hour');
             $minSelected = ConvertSecondToTime($iSecond,'min');
diff --git a/htdocs/core/class/html.formother.class.php b/htdocs/core/class/html.formother.class.php
index 4689ff37c2b..442559bb851 100644
--- a/htdocs/core/class/html.formother.class.php
+++ b/htdocs/core/class/html.formother.class.php
@@ -560,7 +560,7 @@ class FormOther
      */
     function select_month($selected='',$htmlname='monthid',$useempty=0)
     {
-        require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+        require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
         $month = monthArrayOrSelected(-1);	// Get array
 
diff --git a/htdocs/lib/accountancy.lib.php b/htdocs/core/lib/accountancy.lib.php
similarity index 97%
rename from htdocs/lib/accountancy.lib.php
rename to htdocs/core/lib/accountancy.lib.php
index 248db7b5ed7..a1500797866 100644
--- a/htdocs/lib/accountancy.lib.php
+++ b/htdocs/core/lib/accountancy.lib.php
@@ -17,7 +17,7 @@
  */
 
 /**
- *	\file			htdocs/lib/accountancy.lib.php
+ *	\file			htdocs/core/lib/accountancy.lib.php
  *  \brief			Library of accountancy functions
  */
 
diff --git a/htdocs/lib/date.lib.php b/htdocs/core/lib/date.lib.php
similarity index 99%
rename from htdocs/lib/date.lib.php
rename to htdocs/core/lib/date.lib.php
index 1ff08b2a32c..e368943cced 100644
--- a/htdocs/lib/date.lib.php
+++ b/htdocs/core/lib/date.lib.php
@@ -19,7 +19,7 @@
  */
 
 /**
- *  \file		htdocs/lib/date.lib.php
+ *  \file		htdocs/core/lib/date.lib.php
  *  \brief		Set of function to manipulate dates
  */
 
diff --git a/htdocs/fichinter/fiche.php b/htdocs/fichinter/fiche.php
index c363ebe24df..5535aeaffba 100644
--- a/htdocs/fichinter/fiche.php
+++ b/htdocs/fichinter/fiche.php
@@ -29,7 +29,7 @@ require_once(DOL_DOCUMENT_ROOT."/core/class/html.formfile.class.php");
 require_once(DOL_DOCUMENT_ROOT."/fichinter/class/fichinter.class.php");
 require_once(DOL_DOCUMENT_ROOT."/includes/modules/fichinter/modules_fichinter.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/fichinter.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 if ($conf->projet->enabled)
 {
     require_once(DOL_DOCUMENT_ROOT."/lib/project.lib.php");
diff --git a/htdocs/fichinter/list.php b/htdocs/fichinter/list.php
index 1599895b62c..52d07817a06 100755
--- a/htdocs/fichinter/list.php
+++ b/htdocs/fichinter/list.php
@@ -27,7 +27,7 @@
 require("../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/contact/class/contact.class.php");
 require_once(DOL_DOCUMENT_ROOT."/fichinter/class/fichinter.class.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 $langs->load("companies");
 $langs->load("interventions");
diff --git a/htdocs/fourn/facture/index.php b/htdocs/fourn/facture/index.php
index 74403679d83..0fe0af9422c 100644
--- a/htdocs/fourn/facture/index.php
+++ b/htdocs/fourn/facture/index.php
@@ -27,7 +27,7 @@ require("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/fourn/class/fournisseur.facture.class.php");
 require_once(DOL_DOCUMENT_ROOT."/fourn/class/fournisseur.class.php");
 require_once(DOL_DOCUMENT_ROOT."/core/class/html.formother.class.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 if (!$user->rights->fournisseur->facture->lire)
 accessforbidden();
diff --git a/htdocs/includes/modules/action/rapport.pdf.php b/htdocs/includes/modules/action/rapport.pdf.php
index b4dbcc02486..75fab77c5a3 100644
--- a/htdocs/includes/modules/action/rapport.pdf.php
+++ b/htdocs/includes/modules/action/rapport.pdf.php
@@ -25,7 +25,7 @@
  */
 
 require_once(DOL_DOCUMENT_ROOT.'/lib/pdf.lib.php');
-require_once(DOL_DOCUMENT_ROOT.'/lib/date.lib.php');
+require_once(DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php');
 require_once(DOL_DOCUMENT_ROOT."/lib/company.lib.php");
 
 /**
diff --git a/htdocs/includes/modules/fichinter/pdf_soleil.modules.php b/htdocs/includes/modules/fichinter/pdf_soleil.modules.php
index e7cb9256dcd..f254181b748 100644
--- a/htdocs/includes/modules/fichinter/pdf_soleil.modules.php
+++ b/htdocs/includes/modules/fichinter/pdf_soleil.modules.php
@@ -27,7 +27,7 @@
 require_once(DOL_DOCUMENT_ROOT."/includes/modules/fichinter/modules_fichinter.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/company.lib.php");
 require_once(DOL_DOCUMENT_ROOT.'/lib/pdf.lib.php');
-require_once(DOL_DOCUMENT_ROOT.'/lib/date.lib.php');
+require_once(DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php');
 
 
 /**
diff --git a/htdocs/includes/modules/modAdherent.class.php b/htdocs/includes/modules/modAdherent.class.php
index b52c26b60ce..a9e3ccf0ace 100644
--- a/htdocs/includes/modules/modAdherent.class.php
+++ b/htdocs/includes/modules/modAdherent.class.php
@@ -205,7 +205,7 @@ class modAdherent extends DolibarrModules
         $r=0;
 
         $now=dol_now();
-        require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+        require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
         $r++;
         $this->import_code[$r]=$this->rights_class.'_'.$r;
diff --git a/htdocs/includes/modules/rapport/pdf_paiement.class.php b/htdocs/includes/modules/rapport/pdf_paiement.class.php
index 8b05950d414..584cf0a0f30 100644
--- a/htdocs/includes/modules/rapport/pdf_paiement.class.php
+++ b/htdocs/includes/modules/rapport/pdf_paiement.class.php
@@ -74,7 +74,7 @@ class pdf_paiement
 	 */
 	function write_file($_dir, $month, $year, $outputlangs)
 	{
-		include_once(DOL_DOCUMENT_ROOT.'/lib/date.lib.php');
+		include_once(DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php');
 
 		global $user,$langs,$conf;
 
diff --git a/htdocs/lib/xcal.lib.php b/htdocs/lib/xcal.lib.php
index d40c0dfa723..e26f04bfa6d 100644
--- a/htdocs/lib/xcal.lib.php
+++ b/htdocs/lib/xcal.lib.php
@@ -44,7 +44,7 @@ function build_calfile($format,$title,$desc,$events_array,$outputfile)
 	$calfileh=fopen($outputfile,'w');
 	if ($calfileh)
 	{
-	    include_once(DOL_DOCUMENT_ROOT.'/lib/date.lib.php');
+	    include_once(DOL_DOCUMENT_ROOT.'/core/lib/date.lib.php');
 		$now=dol_now();
 
 		$encoding='';
diff --git a/htdocs/product/stock/mouvement.php b/htdocs/product/stock/mouvement.php
index 57ac3354853..cb7a9162f74 100644
--- a/htdocs/product/stock/mouvement.php
+++ b/htdocs/product/stock/mouvement.php
@@ -29,7 +29,7 @@ require_once(DOL_DOCUMENT_ROOT."/product/class/product.class.php");
 require_once(DOL_DOCUMENT_ROOT."/core/class/html.formother.class.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/stock.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/product.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 $langs->load("products");
 $langs->load("stocks");
diff --git a/htdocs/projet/activity/index.php b/htdocs/projet/activity/index.php
index d1252ed31cd..1bc200e92c5 100644
--- a/htdocs/projet/activity/index.php
+++ b/htdocs/projet/activity/index.php
@@ -27,7 +27,7 @@ require ("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/project.class.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/task.class.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/project.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 $mine = $_REQUEST['mode']=='mine' ? 1 : 0;
 
diff --git a/htdocs/projet/activity/list.php b/htdocs/projet/activity/list.php
index 83168a5435b..b109004ab83 100644
--- a/htdocs/projet/activity/list.php
+++ b/htdocs/projet/activity/list.php
@@ -28,7 +28,7 @@ require ("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/project.class.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/task.class.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/project.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 $langs->load('projects');
 
diff --git a/htdocs/projet/ganttview.php b/htdocs/projet/ganttview.php
index 62aa7cf5b67..789dba883d4 100644
--- a/htdocs/projet/ganttview.php
+++ b/htdocs/projet/ganttview.php
@@ -27,7 +27,7 @@ require ("../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/project.class.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/task.class.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/project.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/core/class/html.formother.class.php");
 
 $projectid=isset($_REQUEST["id"])?$_REQUEST["id"]:$_POST["id"];
diff --git a/htdocs/projet/tasks.php b/htdocs/projet/tasks.php
index cd69514b32f..345c161c4d6 100644
--- a/htdocs/projet/tasks.php
+++ b/htdocs/projet/tasks.php
@@ -27,7 +27,7 @@ require ("../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/project.class.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/task.class.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/project.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/core/class/html.formother.class.php");
 
 $mine = $_REQUEST['mode']=='mine' ? 1 : 0;
diff --git a/htdocs/projet/tasks/index.php b/htdocs/projet/tasks/index.php
index 7eeddae234c..335d8622869 100644
--- a/htdocs/projet/tasks/index.php
+++ b/htdocs/projet/tasks/index.php
@@ -27,7 +27,7 @@ require ("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/project.class.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/task.class.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/project.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 $langs->load('projects');
 $langs->load('users');
diff --git a/htdocs/projet/tasks/time.php b/htdocs/projet/tasks/time.php
index 55e249445ec..4aab61e1a62 100644
--- a/htdocs/projet/tasks/time.php
+++ b/htdocs/projet/tasks/time.php
@@ -28,7 +28,7 @@ require("../../main.inc.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/project.class.php");
 require_once(DOL_DOCUMENT_ROOT."/projet/class/task.class.php");
 require_once(DOL_DOCUMENT_ROOT."/lib/project.lib.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 
 $langs->load('projects');
 
diff --git a/scripts/members/sync_members_ldap2dolibarr.php b/scripts/members/sync_members_ldap2dolibarr.php
index 1a66df276ab..2f4b74ba291 100644
--- a/scripts/members/sync_members_ldap2dolibarr.php
+++ b/scripts/members/sync_members_ldap2dolibarr.php
@@ -42,7 +42,7 @@ $forcecommit=0;
 
 
 require_once($path."../../htdocs/master.inc.php");
-require_once(DOL_DOCUMENT_ROOT."/lib/date.lib.php");
+require_once(DOL_DOCUMENT_ROOT."/core/lib/date.lib.php");
 require_once(DOL_DOCUMENT_ROOT."/core/class/ldap.class.php");
 require_once(DOL_DOCUMENT_ROOT."/adherents/class/adherent.class.php");
 require_once(DOL_DOCUMENT_ROOT."/adherents/class/cotisation.class.php");
diff --git a/test/phpunit/DateLibTest.php b/test/phpunit/DateLibTest.php
index 9e99b77bd98..10eb4ce85e5 100644
--- a/test/phpunit/DateLibTest.php
+++ b/test/phpunit/DateLibTest.php
@@ -27,7 +27,7 @@ global $conf,$user,$langs,$db;
 //define('TEST_DB_FORCE_TYPE','mysql');	// This is to force using mysql driver
 require_once 'PHPUnit/Autoload.php';
 require_once dirname(__FILE__).'/../../htdocs/master.inc.php';
-require_once dirname(__FILE__).'/../../htdocs/lib/date.lib.php';
+require_once dirname(__FILE__).'/../../htdocs/core/lib/date.lib.php';
 
 if (empty($user->id))
 {
diff --git a/test/phpunit/WebservicesTest.php b/test/phpunit/WebservicesTest.php
index cfc9b80d94c..6b459bc29a0 100755
--- a/test/phpunit/WebservicesTest.php
+++ b/test/phpunit/WebservicesTest.php
@@ -27,7 +27,7 @@ global $conf,$user,$langs,$db;
 //define('TEST_DB_FORCE_TYPE','mysql');	// This is to force using mysql driver
 require_once 'PHPUnit/Autoload.php';
 require_once dirname(__FILE__).'/../../htdocs/master.inc.php';
-require_once dirname(__FILE__).'/../../htdocs/lib/date.lib.php';
+require_once dirname(__FILE__).'/../../htdocs/core/lib/date.lib.php';
 require_once(NUSOAP_PATH.'/nusoap.php');        // Include SOAP