<script src="https://cdnjs.cloudflare.com/ajax/libs/react/17.0.2/umd/react.development.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/react-dom/17.0.2/umd/react-dom.development.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/babel-standalone/6.26.0/babel.min.js"></script>
<script type="text/babel">
const {useEffect,useState} = React;
const [oneMonthAgo, setOneMonthAgo] = useState('');
const currentDate = new Date();
currentDate.setMonth(currentDate.getMonth() - 1);
const formattedDate = currentDate.toISOString()
setOneMonthAgo(formattedDate);
<div className='container'>
<h1>React Js Date One Month Ago</h1>
<p>Date One Month Ago : {oneMonthAgo}</p>
ReactDOM.render(<App />, document.getElementById('app'));
box-shadow: 0 0 5px rgba(0, 0, 0, 0.1);
font-family: Arial, sans-serif;