I have a JSON model which contains, among others, a few date values which are stored as epoch values:
var oData = [{ string : \"SomeValue\", date : 140
Using a date type might solve this issue
var dateType = new sap.ui.model.type.Date({ pattern: "yyyy/MM/dd" }); ... sortProperty : "date", filterProperty : "date", filterType: dateType
look at this example for a simple use case on birthday column