title: How to detect timezone abbreviation using date-fns-tz?
body: <p>I want to print <strong>timeZone abbreviation</strong> like: IST, UTC, PST, MST, CST, EST, etc...</p>
  <p>I'm migrating my code from momentJS to date-fns and having the following issue. When I was using momentJS everything was working as expected. For example, the code below will print &quot;<strong>IST</strong>&quot;</p>
  <pre><code>const timeZone = 'Asia/Calcutta';
  moment.tz(new Date(), timeZone).format('z'); // IST
  </code></pre>
  <p><a href="https://stackblitz.com/edit/timezone-eo9ng5" rel="noreferrer">Demo using MomentJS</a></p>
  <p>Now my code using <strong>date-fns</strong> works but not all the way because it prints <strong>&quot;India Standard Time&quot;</strong> and I only want to print <strong>IST</strong>.</p>
  <pre><code>format(parisDate, 'zzzz', { timeZone: 'Asia/Calcutta', locale: enGB }); // India Standard Time
  </code></pre>
  <p>Can anyone tell me what I'm missing or doing wrong?
  Here's a live demo of my code: <a href="https://stackblitz.com/edit/date-fns-playground-16wtxv" rel="noreferrer"><strong>date-fns DEMO</strong></a></p>