title: ADF force format stored in parquet from copy activity
body: <p>I've created an ADF pipeline that converts a delimited file to parquet in our datalake.  I've added an additional column and set the value using the following expression <code>@convertfromutc(utcnow(),'GMT Standard Time','o')</code>.  The problem I am having is when I look at the parquet file it is coming back in the US format.</p>
  <p>eg 11/25/2021 14:25:49</p>
  <p>Even if I use <code>@if(pipeline().parameters.LoadDate,json(concat('[{&quot;name&quot;: &quot;LoadDate&quot; , &quot;value&quot;: &quot;',formatDateTime(convertfromutc(utcnow(),'GMT Standard Time','o')),'&quot;}]')),NULL)</code> to try to force the format on the extra column it still comes back in the parquet in the US format.</p>
  <p>Any idea why this would be and how I can get this to output into parquet as a proper timestamp?</p>