diff --git a/htdocs/core/lib/functions.lib.php b/htdocs/core/lib/functions.lib.php
index 3282d916745..0786ea6db3c 100644
--- a/htdocs/core/lib/functions.lib.php
+++ b/htdocs/core/lib/functions.lib.php
@@ -2781,7 +2781,7 @@ function dol_format_address($object, $withcountry = 0, $sep = "\n", $outputlangs
 function dol_strftime($fmt, $ts = false, $is_gmt = false)
 {
 	if ((abs($ts) <= 0x7FFFFFFF)) { // check if number in 32-bit signed range
-		return ($is_gmt) ? @gmstrftime($fmt, $ts) : @strftime($fmt, $ts);
+		return ($is_gmt) ? @gmstrftime($fmt, $ts) : @dol_print_date($ts, $fmt);
 	} else {
 		return 'Error date into a not supported range';
 	}
diff --git a/htdocs/core/lib/functions2.lib.php b/htdocs/core/lib/functions2.lib.php
index a07c7868c3c..292bbb82eaf 100644
--- a/htdocs/core/lib/functions2.lib.php
+++ b/htdocs/core/lib/functions2.lib.php
@@ -1612,7 +1612,7 @@ function hexbin($hexa)
  */
 function numero_semaine($time)
 {
-	$stime = strftime('%Y-%m-%d', $time);
+	$stime = dol_print_date($time, '%Y-%m-%d');
 
 	if (preg_match('/^([0-9]+)\-([0-9]+)\-([0-9]+)\s?([0-9]+)?:?([0-9]+)?/i', $stime, $reg)) {
 		// Date est au format 'YYYY-MM-DD' ou 'YYYY-MM-DD HH:MM:SS'
diff --git a/htdocs/core/modules/facture/mod_facture_terre.php b/htdocs/core/modules/facture/mod_facture_terre.php
index 95bc0dc27d2..f7937701a3b 100644
--- a/htdocs/core/modules/facture/mod_facture_terre.php
+++ b/htdocs/core/modules/facture/mod_facture_terre.php
@@ -262,7 +262,7 @@ class mod_facture_terre extends ModeleNumRefFactures
 			return $ref;
 		} elseif ($mode == 'next') {
 			$date = $invoice->date; // This is invoice date (not creation date)
-			$yymm = strftime("%y%m", $date);
+			$yymm = dol_print_date($date, "%y%m");
 
 			if ($max >= (pow(10, 4) - 1)) {
 				$num = $max + 1; // If counter > 9999, we do not format on 4 chars, we take number as it is
diff --git a/htdocs/core/modules/mrp/mod_mo_standard.php b/htdocs/core/modules/mrp/mod_mo_standard.php
index c27c36c8849..72ea06d05ab 100644
--- a/htdocs/core/modules/mrp/mod_mo_standard.php
+++ b/htdocs/core/modules/mrp/mod_mo_standard.php
@@ -142,7 +142,7 @@ class mod_mo_standard extends ModeleNumRefMos
 
 		//$date=time();
 		$date = $object->date_creation;
-		$yymm = strftime("%y%m", $date);
+		$yymm = dol_print_date($date, "%y%m");
 
 		if ($max >= (pow(10, 4) - 1)) {
 			$num = $max + 1; // If counter > 9999, we do not format on 4 chars, we take number as it is
diff --git a/htdocs/core/modules/product_batch/mod_lot_standard.php b/htdocs/core/modules/product_batch/mod_lot_standard.php
index f6b674cf3f6..b63aff30a84 100644
--- a/htdocs/core/modules/product_batch/mod_lot_standard.php
+++ b/htdocs/core/modules/product_batch/mod_lot_standard.php
@@ -144,7 +144,7 @@ class mod_lot_standard extends ModeleNumRefBatch
 
 		//$date=time();
 		$date = dol_now();
-		$yymm = strftime("%y%m", $date);
+		$yymm = dol_print_date($date, "%y%m");
 
 		if ($max >= (pow(10, 4) - 1)) {
 			$num = $max + 1;
diff --git a/htdocs/core/modules/product_batch/mod_sn_standard.php b/htdocs/core/modules/product_batch/mod_sn_standard.php
index 42d55ff92b7..5f569baa498 100644
--- a/htdocs/core/modules/product_batch/mod_sn_standard.php
+++ b/htdocs/core/modules/product_batch/mod_sn_standard.php
@@ -144,7 +144,7 @@ class mod_sn_standard extends ModeleNumRefBatch
 
 		//$date=time();
 		$date = dol_now();
-		$yymm = strftime("%y%m", $date);
+		$yymm = dol_print_date($date, "%y%m");
 
 		if ($max >= (pow(10, 4) - 1)) {
 			$num = $max + 1;
diff --git a/htdocs/product/class/product.class.php b/htdocs/product/class/product.class.php
index 5a7ae18ee1d..d034d7ebd7d 100644
--- a/htdocs/product/class/product.class.php
+++ b/htdocs/product/class/product.class.php
@@ -3889,8 +3889,8 @@ class Product extends CommonObject
 		}
 
 		if (empty($year)) {
-			$year = strftime('%Y', time());
-			$month = strftime('%m', time());
+			$year = dol_print_date(time(), '%Y');
+			$month = dol_print_date(time(), '%m');
 		} elseif ($year == -1) {
 			$year = '';
 			$month = 12; // We imagine we are at end of year, so we get last 12 month before, so all correct year.
diff --git a/htdocs/product/stock/movement_card.php b/htdocs/product/stock/movement_card.php
index 0416064f466..11c3dc31649 100644
--- a/htdocs/product/stock/movement_card.php
+++ b/htdocs/product/stock/movement_card.php
@@ -1146,8 +1146,8 @@ if ($resql) {
 			$productidselected = $key;
 			$productlabelselected = $val;
 		}
-		$datebefore = dol_get_first_day($year ? $year : strftime("%Y", time()), $month ? $month : 1, true);
-		$dateafter = dol_get_last_day($year ? $year : strftime("%Y", time()), $month ? $month : 12, true);
+		$datebefore = dol_get_first_day($year ? $year : dol_print_date(time(), "%Y"), $month ? $month : 1, true);
+		$dateafter = dol_get_last_day($year ? $year : dol_print_date(time(), "%Y"), $month ? $month : 12, true);
 		$balancebefore = $movement->calculateBalanceForProductBefore($productidselected, $datebefore);
 		$balanceafter = $movement->calculateBalanceForProductBefore($productidselected, $dateafter);
 
diff --git a/htdocs/product/stock/movement_list.php b/htdocs/product/stock/movement_list.php
index 9a447d213db..d8cb47f17fe 100644
--- a/htdocs/product/stock/movement_list.php
+++ b/htdocs/product/stock/movement_list.php
@@ -1641,8 +1641,8 @@ if (count($arrayofuniqueproduct) == 1 && !empty($year) && is_numeric($year)) {
 		$productidselected = $key;
 		$productlabelselected = $val;
 	}
-	$datebefore = dol_get_first_day($year ? $year : strftime("%Y", time()), $month ? $month : 1, true);
-	$dateafter = dol_get_last_day($year ? $year : strftime("%Y", time()), $month ? $month : 12, true);
+	$datebefore = dol_get_first_day($year ? $year : dol_print_date(time(), "%Y"), $month ? $month : 1, true);
+	$dateafter = dol_get_last_day($year ? $year : dol_print_date(time(), "%Y"), $month ? $month : 12, true);
 	$balancebefore = $movement->calculateBalanceForProductBefore($productidselected, $datebefore);
 	$balanceafter = $movement->calculateBalanceForProductBefore($productidselected, $dateafter);
 
diff --git a/htdocs/projet/activity/index.php b/htdocs/projet/activity/index.php
index 8be73099cac..6d7f9656d73 100644
--- a/htdocs/projet/activity/index.php
+++ b/htdocs/projet/activity/index.php
@@ -327,7 +327,7 @@ if (getDolGlobalString('PROJECT_TASK_TIME_YEAR')) {
 	print '<div class="div-table-responsive-no-min">';
 	print '<br><table class="noborder centpercent">';
 	print '<tr class="liste_titre">';
-	print '<td>'.$langs->trans("ActivityOnProjectThisYear").': '.strftime("%Y", $now).'</td>';
+	print '<td>'.$langs->trans("ActivityOnProjectThisYear").': '.dol_print_date($now, "%Y").'</td>';
 	print '<td class="right">'.$langs->trans("Time").'</td>';
 	print "</tr>\n";
 
@@ -340,7 +340,7 @@ if (getDolGlobalString('PROJECT_TASK_TIME_YEAR')) {
 	$sql .= " AND tt.fk_element = t.rowid";
 	$sql .= " AND tt.elementtype = 'task'";
 	$sql .= " AND tt.fk_user = ".((int) $user->id);
-	$sql .= " AND YEAR(element_date) = '".strftime("%Y", $now)."'";
+	$sql .= " AND YEAR(element_date) = '".dol_print_date($now, "%Y")."'";
 	$sql .= " AND p.rowid in (".$db->sanitize($projectsListId).")";
 	$sql .= " GROUP BY p.rowid, p.ref, p.title, p.public";
 
diff --git a/htdocs/salaries/card.php b/htdocs/salaries/card.php
index 89442fa0b4c..bfb5cd7d357 100644
--- a/htdocs/salaries/card.php
+++ b/htdocs/salaries/card.php
@@ -496,7 +496,7 @@ if ($id > 0) {
 // Create
 if ($action == 'create' && $permissiontoadd) {
 	$year_current = dol_print_date(dol_now('gmt'), "%Y", 'gmt');
-	$pastmonth = strftime("%m", dol_now()) - 1;
+	$pastmonth = dol_print_date(dol_now(), "%m") - 1;
 	$pastmonthyear = $year_current;
 	if ($pastmonth == 0) {
 		$pastmonth = 12;