gistfile1.txt

angular.module('FixDateFilter', [])
    .filter('fixdate', function() {
        return function(input) {
            if(input == null) 
                output = "N/A";
            else if(input == "midnight")
                output = "N/A";
            else if(input == "")
                output = "N/A";
            else if(input == "1900-01-01")
                output = "N/A";
            else
                output = input;
            return output;
        }
    })