How to convert dates to UTC in vanilla JavaScript Posted on April 14, 2013

When you create a JavaScript Date object, it will set the date in your time zone. If you want to keep the same date, but convert it to UTC/GMT for storage and comparison purposes, use the function below:

//Converts a Date object to its equivalent in UTC time.
function dateToUTC(date) {
    return new Date(date.getUTCFullYear(), date.getUTCMonth(), date.getUTCDate(), date.getUTCHours(), date.getUTCMinutes(), date.getUTCSeconds());
}

This will convert a date such as January 6, 17:24 EST to January 6, 17:24 GMT.