VALIDATE ALL THE DATES!!!!

valiDate.js

var leadingZeros = function(num, length) {
  length = length || 2;
  num = String(num);
  while (num.length < length) {
    num = "0" + num;
  }
  return num;
};

var validDate = function(value) {
  if (!!value && value.match(/^(\d{2}\.){2}\d{4}$/g)) {
    var parts = ko.utils.arrayMap(value.split('.'), function(part) { return parseInt(part, 10); }),
        inputDate = new Date(parts[2], parts[1] - 1, parts[0]),
        gernatedDate = [leadingZeros(inputDate.getDate()), leadingZeros(inputDate.getMonth() + 1), inputDate.getFullYear()].join('.');

    return +inputDate > +(new Date()) && value === gernatedDate;
  }
  return false;
};