diff --git a/htdocs/install/mysql/tables/llx_cronjob.sql b/htdocs/install/mysql/tables/llx_cronjob.sql
index 61036c3bd4b..a7ed4858024 100644
--- a/htdocs/install/mysql/tables/llx_cronjob.sql
+++ b/htdocs/install/mysql/tables/llx_cronjob.sql
@@ -33,11 +33,11 @@ CREATE TABLE llx_cronjob
 	md5params 		varchar(32),
   	module_name 		varchar(255),
   	priority 		integer DEFAULT 0,
-  	datelastrun 		datetime,
-  	datenextrun 		datetime,
-  	datestart		datetime,
-  	dateend			datetime,
-  	datelastresult      	datetime,
+  	datelastrun 		datetime,					-- date last run and when should be next
+  	datenextrun 		datetime,					-- job will be run if current date higher that this date
+  	datestart		datetime,						-- before this date no jobs will be run
+  	dateend			datetime,						-- after this date, no more jobs will be run
+  	datelastresult      	datetime,				
   	lastresult      	text,
   	lastoutput      	text,
   	unitfrequency	 	integer NOT NULL DEFAULT 0,
diff --git a/scripts/cron/cron_run_jobs.php b/scripts/cron/cron_run_jobs.php
index 94bde0fb153..a26db4c3fab 100755
--- a/scripts/cron/cron_run_jobs.php
+++ b/scripts/cron/cron_run_jobs.php
@@ -127,9 +127,9 @@ if(is_array($object->lines) && (count($object->lines)>0))
 		// Loop over job
 		foreach($object->lines as $line)
 		{
-
-			//If date_next_jobs is less of current dat, execute the program, and store the execution time of the next execution in database
-			if (($line->datenextrun < $now) && $line->dateend < $now){
+			//If date_next_jobs is less of current date, execute the program, and store the execution time of the next execution in database
+			if (($line->datenextrun < $now) && (empty($line->datestart) || $line->datestart <= $now) && (empty($line->dateend) || $line->dateend >= $now))
+			{
 				$cronjob=new Cronjob($db);
 				$result=$cronjob->fetch($line->id);
 				if ($result<0) {