https://community.appian.com/discussions/f/rules/860/function----intervalds-hello-i-am-using-the-following-expressionFunction --&gt; intervalds Hello I am using the following expression and collecting info in a Date And Time Variable. It gives me a wrong value. It gives me a backward date . For e.g. for --&gt; now()+intervalds(720,0,0) It gives me--&gt; May 26, 2013 1:09 AMen-USTelligent Community 12https://community.appian.com/thread/2853?ContentTypeID=1Sat, 15 Jun 2013 04:28:35 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:708d524a-91b1-4557-b3b4-6a43d2004034venkateshrDid a quick test and looks like the intervalds function works well till 596 hours (roughly 24 days). Anything between the next 24 days (597 till 1191), it gives a date in the 24 days prior to the current date and this is cyclical. I.e. now()+intervalds(1192,0,0) , now()+intervalds(2384,0,0) all give the current date. <br /><br />For your use case, if the user enters the number of days as an integer, you can simply add now()+days_entered_by_user. You can use the calladddays function if business days are to be considered.<div style="clear:both;"></div>