Error Messages

Getting the following error messages over an over in my error log:

[14-Feb-2017 14:50:06 UTC] PHP Warning: mktime() expects parameter 5 to be long, string given in /home/mysite/public_html/wp-content/plugins/widget-countdown/includes/front_end.php on line 71
[14-Feb-2017 14:50:06 UTC] PHP Warning: mktime() expects parameter 5 to be long, string given in /home/mysite/public_html/wp-content/plugins/widget-countdown/includes/front_end.php on line 113

Here is line 71:
$curent_time=mktime ($end_date_hour[‘0’], $end_date_hour[1],0,$end_date_only_date[1], $end_date_only_date[0],$end_date_only_date[2]);

Here is line 113:
$curent_time=mktime ($end_date_hour[‘0’], $end_date_hour[1],0,$end_date_only_date[1], $end_date_only_date[0],$end_date_only_date[2]);