Date steps

  // Today date
  $(function () {
    Date.prototype.addDays = function(days) {
      this.setDate(this.getDate() + parseInt(days));
      return this;
    };

    Date.prototype.format = function(format) {
      // set default format if function argument not provided
      format = format || 'YYYY-MM-DD hh:mm';

      var zeropad = function(number, length) {
        number = number.toString();
        length = length || 2;
        while(number.length < length)
          number = '0' + number;
        return number;
      },
      // here you can define your formats
      formats = {
        YYYY: this.getFullYear(),
        MM: zeropad(this.getMonth() + 1),
        DD: zeropad(this.getDate()),
        hh: zeropad(this.getHours()),
        mm: zeropad(this.getMinutes())
      },
      pattern = '(' + Object.keys(formats).join(')|(') + ')';

      return format.replace(new RegExp(pattern, 'g'), function(match) {
        return formats[match];
      });
    };

    var currentDate    = new Date(),
        $dates         = $('[data-time]'),
        $currentDate   = $('.date__number');

    $currentDate.text(currentDate.format('DD.MM.YYYY'));

    $dates.each(function() {
      var $this = $(this),
          addDate = $this.data('time');

      currentDate.addDays(addDate);
      $this.text(currentDate.format('DD.MM.YYYY'));
    });
  });