title: What format is the exp (Expiration Time) claim in a JWT
body: <p>I am using ADAL library to get access token for a resource. Does anyone know what format is the expiration time in ? more specifically
  <code>&quot;exp&quot; (Expiration time) claim</code>.</p>
  <p><code>JwtSecurityToken</code> class simply returns int32 after parsing. So, that is not a good indicator.</p>
  <p>Tried parsing it to <code>TimeSpan</code> and <code>DateTime</code> but the values are not 90 minutes apart. It's almost the same.</p>
  <p>This is what I get from fiddler for <code>iat</code> and <code>exp</code> claim (used <a href="https://jwt.io/" rel="noreferrer">https://jwt.io/</a> to parse the token)</p>
  <p><code>iat</code>: 1475874457</p>
  <p><code>exp</code>: 1475878357</p>
  <p>The values are not that much apart.</p>