Setting the current date/time in windows.

package.json

{
	"name":"update-dtm"
	,"version":"0.1.0"
	,"dependencies":{
		"request":"2.x.x"
	}
	,"devDependencies":{}
}

update-dtm-win.node.js

/*
GIST: https://gist.github.com/3406378

This is a quick/simple solution for updating the current date/time in windows (for when say your motherboard clock battery dies.

This uses a Yahoo API call, I'm excluding my API key, but it's easy/free to get one.
*/


var util = require("util")
	,cp = require("child_process")
	,request = require("request")
	,dtm_url = "http://developer.yahooapis.com/TimeService/V1/getTime?output=json&appid=YOUR_KEY_HERE"
	,tries = 0
	;

console.log("Will attempt to update the date/time in 3 seconds.");
setTimeout(getDateTime,3000);

function getDateTime() {
	tries++;
	console.log("Attempting to get the date/time from the internet...\n");

	request(dtm_url, function(err,response,body){
		if (err) {
			if (tries = 10) {
				console.log("failed (Tried 10 times, will not try again).");
				return;
			}
			console.log("failed. (trying again in 5 seconds)\n\n");
			setTimeout(getDateTime,5000);
		}
		var resp = JSON.parse(body);
		var dtm = new Date(resp.Result.Timestamp * 1000);

		updateSystemDate(dtm);
	});
}

function updateSystemDate(dtm) {
	var d = [dtm.getMonth()+1,dtm.getDate(),dtm.getFullYear().toString(10).substring(2)].join('-');
	console.log("Updating system date to " + d);
	var dateprocess = cp.spawn("cmd",["/C","date",d],{cwd:process.cwd()});
	dateprocess.stdout.on('data',function(data){process.stdout.write(data);});
	dateprocess.stderr.on('data',function(data){process.stderr.write(data);});
	dateprocess.on('exit',function(code,signal){
		if (code !== 0) {
			console.log(util.format("Failed to set date, ErrorLevel %d", code));
			return;
		}
		updateSystemTime(dtm);
	});
}

function updateSystemTime(dtm) {
	var t = dtm.getHours() + ':' + dtm.getMinutes();
	console.log("Updating system time to " + t);
	var timeprocess = cp.spawn("cmd",["/C","time",t],{cwd:process.cwd()});
	timeprocess.stdout.on('data',function(data){process.stdout.write(data);});
	timeprocess.stderr.on('data',function(data){process.stderr.write(data);});
	timeprocess.on('exit',function(code,signal){
		if (code !== 0) {
			console.log(util.format("Failed to set time, ErrorLevel %d", code));
			return;
		}
		console.log("done.\n");
	});
}