CodePen Embed - CSS only calendar??

<iframe src='https://experiments-ten.vercel.app/css-api/'></iframe>

html, body {
	margin: 0;
	padding: 0;
}

iframe {
	margin: 0;
	padding: 0;
	width: 100vw;
	height: 100vh;
	border: none;
}

This Pen is owned by Siddharth Shyniben on CodePen.

This Pen doesn't use any external CSS resources.

This Pen doesn't use any external JavaScript resources.