Here is the correct answer:
<!DOCTYPE html>
<html>
<head>
<title>
My Webpage Title
</title>
</head>
<body>
<form>
<input type="radio" name="time" value="day"/>
<label>Day</label>
<input type="radio" name="time" value="Night"/>
<label>Night</label>
</form>
</body>
</html>