var timekey = require('time-key');
var timestamp = require('time-stamp');
var key = timekey('YYYYMMDDHH');
console.log(key.key());		// 2016061112
console.log(timestamp('YYYY/MM/DD HH:mm:ss:ms', new Date(key.ttl)));	// 2016/06/11 13:00:00:00
 
// after 1 hour
console.log(key.key());		// 2016061113
console.log(timestamp('YYYY/MM/DD HH:mm:ss:ms', new Date(key.ttl)));	// 2016/06/11 14:00:00:00