How to execute node-cron task specific time?

Originally i want to run cron jobs every morning 6:00AM , so i started testing with below code to run my cron jobs every 5 minutes but i did not see anything in 5 minutes. So my question is what is implemented wrong in below code and how can i implement with specific time ?

cron.js

var cron = require('node-cron');
var fs = require('fs');
var path = require('path');
var async = require('async');
var cronJob = new cron.CronJob('*/5 * * * *', function() {
    // read each directory
    async.eachSeries(directories, function (dir, cb1) {
        var dir = __dirname + dir;
        console.log('reading', dir);
        // get files for the directory
        fs.readdir(dir, function (err, files) {
            if (err) return (err);
            console.log(files);
            compareDates(files);

        });
    });

});

function compareDates(files) {
  // code to run this function 
  //

}

via hussain