title: How to have null values for datetime parameter in ssrs reports?
body: <p>I have three parameters on my report: <code>StartDate</code>, <code>EndDate</code> and <code>AccountID</code>. </p>
  
  <p>I want to make <code>StartDate</code> and <code>EndDate</code> as optional values. How can I achieve this? I see that there is no option for selecting allow blank values for the parameters</p>