title: Azure Data Factory Mapping Data Flow: Epoch timestamp to Datetime
body: <p>I have a JSON-based source I'd like to transform using ADF Mapping Data Flow. I have a string containing an epoch timestamp value that I want to transform to Datetime value to later sink it into Parquet file. </p>
  
  <p>Do you know a way? Docs of this language are <a href="https://docs.microsoft.com/azure/data-factory/data-flow-expression-functions" rel="nofollow noreferrer">here</a>.</p>
  
  <p>Source file:</p>
  
  <pre><code>{
    "timestamp":"1574127407",
    "name":"D.A."
  }
  </code></pre>