https://community.appian.com/discussions/f/new-to-appian/26872/validation-on-calendar-controlif the Locale settings is &quot;English (United Kingdom)&quot; then invalid date format error should display dd/mm/yyyy . Appian is hosted in USA. Calender by default is giving mm/dd/yyyy.en-USTelligent Community 12https://community.appian.com/thread/105777?ContentTypeID=1Tue, 20 Dec 2022 16:16:15 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:a680b5a9-7bbb-436c-8f58-366c9d7866cbMike Schmitt<p><span class="emoticon" data-url="https://community.appian.com/cfs-file/__key/system/emoji/1f644.svg" title="Rolling eyes">&#x1f644;</span></p> <p><img src="/resized-image/__size/320x240/__key/communityserver-discussions-components-files/62/pastedimage1671553053297v1.png" alt=" " /></p><div style="clear:both;"></div>https://community.appian.com/thread/105776?ContentTypeID=1Tue, 20 Dec 2022 16:15:06 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:aca72cb8-9d51-420e-915e-76756e7e46adgregoryh3521[deleted]<div style="clear:both;"></div>https://community.appian.com/thread/105774?ContentTypeID=1Tue, 20 Dec 2022 15:58:26 GMTd3a83456-d57b-489c-a84c-4e8267bb592a:b1daec35-8609-4411-b933-f5fac568e98fMike Schmitt<p>This has been previously reported, and (iirc) is currently a known issue by Appian.</p><div style="clear:both;"></div>