This is the database date setting:

This is the table setting for the date (scroll down the settings to find the date setting):

This is the code for displaying the date in the 2nd column:
“id” : “col2” ,
“dataPath” : “date” ,
“label” : “Date” ,
“width” : 100 , // Column width
“visible” : true ,
“type” : “date” ,
“linkPath” : “link-field-or-property” ,
}]
This is the output:

The date is formatted as en-GB in the database (DD/MM/YYYY)
Hope this helps.