format.toValue and format.toDisplay undefined

[debbieAtenea]

I have an issue with parsing dates format.

Everything is correct but the line 306 is not doing anything.

// v1.0.0 - Parse format (date)
 EvoCalendar.prototype.parseFormat = function(format) {
     var _ = this;
     if (typeof format.toValue === 'function' && typeof format.toDisplay === 'function')
         return format;
     // IE treats \0 as a string end in inputs (truncating the value),
     // so it's a bad format delimiter, anyway
     var separators = format.replace(_.initials.validParts, '\0').split('\0'),
         parts = format.match(_.initials.validParts);
     if (!separators || !separators.length || !parts || parts.length === 0){
         console.log("%c Invalid date format ", "color:white;font-weight:bold;background-color:#e21d1d;");
     }
     return {separators: separators, parts: parts};
 };

// v1.0.0 - Format date
 EvoCalendar.prototype.formatDate = function(date, format, language) {
     var _ = this;
     if (!date)
         return '';
     language = language ? language : _.defaults.language
     if (typeof format === 'string')
         format = _.parseFormat(format);
     if (format.toDisplay)                          #This is the line 306 in the code.
         return format.toDisplay(date, format, language);

     var ndate = new Date(date);
     // if (!_.isValidDate(ndate)) { // test
     //     ndate = new Date(date.replace(/-/g, '/'))
     // }
     
     var val = {
         d: ndate.getDate(),
         D: _.initials.dates[language].daysShort[ndate.getDay()],
         DD: _.initials.dates[language].days[ndate.getDay()],
         m: ndate.getMonth() + 1,
         M: _.initials.dates[language].monthsShort[ndate.getMonth()],
         MM: _.initials.dates[language].months[ndate.getMonth()],
         yy: ndate.getFullYear().toString().substring(2),
         yyyy: ndate.getFullYear()
     };
     
     val.dd = (val.d < 10 ? '0' : '') + val.d;
     val.mm = (val.m < 10 ? '0' : '') + val.m;
     date = [];
     var seps = $.extend([], format.separators);
     for (var i=0, cnt = format.parts.length; i <= cnt; i++){
         if (seps.length)
             date.push(seps.shift());
         date.push(val[format.parts[i]]);
     }
     return date.join('');
 };

When I go to the DOM and see the eventList is showing ,as a title, NaN, NaN

How do I solve this issue as I think is giving a non show error to display the event tag with the data.