Selecting Date and Time button, calendar appears at top left of screen instead of next to fieldIssue <!-- div.margin { padding: 10px 40px 40px 30px; } table.tocTable { border: 1px solid; border-color: #e0e0e0; background-color: #fff; } .title { color: #d1232b; font-weight: normal; font-size: 28px; } h1 { color: #d1232b; font-weight: normal; font-size: 21px; margin-bottom: 5px; border-bottom-width: 2px; border-bottom-style: solid; border-bottom-color: #cccccc; } h2 { color: #646464; font-weight: bold; font-size: 18px; } h3 { color: #000000; font-weight: bold; font-size: 16px; } h4 { color: #666666; font-weight: bold; font-size: 15px; } h5 { color: #000000; font-weight: bold; font-size: 13px; } h6 { color: #000000; font-weight: bold; font-size:14px; } ul, ol { margin-left: 0; list-style-position: outside; } --> Symptoms When the user clicks on a date field button to pop up the calendar, the user sees the calendar in the top left corner of the form: Release Confirmed in Madrid, but can also happen in Kingston and London Cause In the console will find the following error: incident.do:2644 RangeError: Invalid language tag: en.us at Date.toLocaleDateString (<anonymous>) at e._showMonth (GwtDateTimePicker.js:288) at e._createControls (GwtDateTimePicker.js:93) at e.initialize (GwtDateTimePicker.js:37) at new e (js_includes_doctype.jsx:3) at Array.<anonymous> (incident.do:2642) at x (js_includes_ui16_form.jsx:11103) at wait (js_includes_ui16_form.jsx:11103) at Object.runQueue (js_includes_ui16_form.jsx:11103) at Object.getScripts (js_includes_doctype.jsx:243)The code is expecting "en" instead of "en.us" Resolution In the filter navigator go to sys_properties.list. Search for glide.sys.language. Check the value that is set. If the value is "en.US", change it back to "en" which should resolve the issue.