How to convert a Date to UTC?
date, javascript, utc
Solution
The `toISOString()` method returns a string in simplified extended ISO format (ISO 8601), which is always 24 or 27 characters long (`YYYY-MM-DDTHH:mm:ss.sssZ` or `±YYYYYY-MM-DDTHH:mm:ss.sssZ`, respectively). The timezone is always zero UTC offset, as denoted by the suffix "`Z`".
Source: MDN web docs
The format you need is created with the `.toISOString()` method. For older browsers (ie8 and under), which don't natively support this method, the shim can be found here:
This will give you the ability to do what you need:
var isoDateString = new Date().toISOString();
console.log(isoDateString);
For Timezone work, moment.js and moment.js timezone are really invaluable tools...especially for navigating timezones between client and server javascript.
Problem
Suppose a user of your website enters a date range. ``` 2009-1-1 to 2009-1-3 ``` You need to send this date to a server for some processing, but the server expects all dates and times to be in UTC. Now suppose the user is in Alaska. Since they are in a timezone quite different from UTC, the date range needs to be converted to something like this: ``` 2009-1-1T8:00:00 to 2009-1-4T7:59:59 ``` Using the JavaScript `Date` object, how would you convert the first "localized" date range into something the server will understand?