sharing between modules?

foobar.js

/* foo.js */
var date = new Date();
exports.Date = date;

/* bar.js */
var foo = require('./foo.js');
exports.Date = foo.Date;

/* foobar.js */
var foo = require('./foo.js');
var bar = require('./bar.js');

console.log(foo.Date);
console.log(bar.Date)