'#description'=>$this->t('The field value should be a string in the format hh:mm:ss.sss, hh:mm:sss or hh:mm. For example, "05:00" signifies 5 hours.'),
'#description'=>$this->t('For specifying the end time of each recurring event instance. The field value should be a string in the format hh:mm:ss.sss, hh:mm:sss or hh:mm. For example, "05:00" signifies 5 hours.'),