title: How to create a postgres column with a default timestamp value of epoch?
body: <p>I want to create a timestamp column with a default value of epoch. How can I do it? This, and all the variations I've tried don't work:</p>
  
  <pre><code>...
  last_viewed_at     TIMESTAMP WITH TIME ZONE NOT NULL DEFAULT TIMESTAMP "epoch",
  ...
  </code></pre>