https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date/toISOString
Date.prototype.toISOString() - JavaScript | MDN
The toISOString() method of Date instances returns a string representing this date in the date time string format, a simplified format based on ISO 8601, which...
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https://www.w3schools.com/jsref/jsref_toisostring.asp
JavaScript Date toISOString() Method
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML...
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