title: Woocommerce: Customizing the availability of a category
body: <p>I have many products nested within parent categories in WooCommerce.
  I want to be able to apply a custom field where I can specify a time availability for categories as a admin feature only in Back end.</p>
  <p><strong>Theory:</strong></p>
  <ol>
  <li>Back end - On each parent category I will have this custom field where I can type or choose a <strong><code>time frame</code></strong>: for example <strong><code>11:00-17:00</code></strong>.</li>
  <li>Front end:</li>
  </ol>
  <ul>
  <li>During this <strong><code>time frame</code></strong>, users will be able to browse all the products within that category.</li>
  <li>Outside of this <strong><code>time frame</code></strong> all the products within that category will stay visible (but inactive) and they will be displayed greyed out or with a <strong><code>'closed'</code></strong> banner <em>(something like that)</em>.</li>
  </ul>
  <p>Where can I start with this?</p>