1) open https://www.telerik.com/kendo-react-ui/components/dateinputs/datetimepicker/#toc-basic-usage
2) click to open the date time picker on the field
3) click Today
4) click Now
5) observe the Date/Time entered in the text field
You can also change the Date/Time and retry.
The Date gets properly set when selecting "Today" but the Time, always stays to the selection it was when clicking "Now".
Basically, "Now" acts like the "Set" button