Date fields from CSV are coming as String data type in kibana 7.2 instead of Date data type

Dear All,

Am loading CSV file into logstash, Date field is loading as String data type in kibana, which i need to be in Date data type. Please help me to identify where am lagging to achieve the same. Please find the attached screenshots of CSV, MApping amd Config file and help me to get the output as Date Datatype.

CSV Mapping