Hi Igor
Take a look at the following example JS Bin BirthDate has a pattern and the column is filterable
The date is formatted to "dd.MM.yyyy" using a fomatter function dateShort.
The filter uses sap.ui.model.type.Date to fomat the pattern: "dd.MM.yyyy" back to a date format "yyyy-MM-dd"
UPDATE: just noticed if i put ">29.05.1960" in the date filter, the code changes the filter from an EQ to a GT, works for other operators too.
hth
jsp
