diff --git a/htdocs/core/lib/date.lib.php b/htdocs/core/lib/date.lib.php
index 278b782ed4a..878c4fdfa50 100644
--- a/htdocs/core/lib/date.lib.php
+++ b/htdocs/core/lib/date.lib.php
@@ -1024,7 +1024,7 @@ function num_public_holiday($timestampStart, $timestampEnd, $country_code = '',
  */
 function num_between_day($timestampStart, $timestampEnd, $lastday = 0)
 {
-	if ($timestampStart < $timestampEnd) {
+	if ($timestampStart <= $timestampEnd) {
 		if ($lastday == 1) {
 			$bit = 0;
 		} else {