This is my code, there are 2 files:

file b.js

```
module.exports.data = function() {
    return new Date();
}

```

file a.js

```
var a = require("./b")
var http = require('http')
http.createServer(function(req, res) {
    res.writeHead(200, {'Content-type':'text/plain'})
    res.write('the date is: '+a.data)
    res.end();
}).listen(8000)

```

Why not print the date?