What does a cookie with 1969 as the expiration date mean? : <p><a href="https://i.stack.imgur.com/l5b4I.png" rel="noreferrer"><img src="https://i.stack.imgur.com/l5b4I.png" alt="enter image description here"></a></p>

<p>How can a cookie expire in 1969?</p>

<p>What does this mean?</p>

<p>Thanks,</p>
