title: Azure DevOps nightly build - schedules \ cron syntax
body: <p>I am trying to set my nightly build to occur at 00:30 every day in my build pipeline YAML file.
  I get the following error when trying to build:</p>
  
  <blockquote>
    <p><code>Improperly formed cron syntax: '00 30 00 * * *'</code></p>
  </blockquote>
  
  <p>This is what I've tried:</p>
  
  <pre><code>schedules:
  - cron: '00 30 00 * * *'
  </code></pre>
  
  <p>and I have tried:</p>
  
  <pre><code>schedules:
  - cron: '0 30 0 * * *'
  </code></pre>
  
  <p>I am checking my work against the following <a href="http://cronexpressiondescriptor.azurewebsites.net/?expression=00+30+00+*+*+*&amp;locale=en" rel="noreferrer">tool</a> (not totally sure if the tool is perfect though).</p>
  
  <p>Microsoft Doc: <a href="https://docs.microsoft.com/en-us/azure/devops/pipelines/yaml-schema?view=azure-devops&amp;tabs=schema#scheduled-trigger" rel="noreferrer">azure/devops/pipelines/yaml-schema</a></p>