Add below code snippet in the start Date exit event: var startDate= util.scand("yyyy-mm-dd", this.rawValue);var endDate = new Date(startDate.getFullYear(), startDate.getMonth(), startDate.getDate() +90, 0, 0, 0, 0);var yyyy = endDate.getFullYear().toString();var mm = (endDate.getMonth()+1).toString(...