Release : 17.2
Component : CA SERVICE CATALOG
If you want to allow any date but only time to be restricted, this can be done using form script in 'onvalidate' attribute for the date field in the form by checking the time value and instructing the user to select between the allowed time range.
Example:
onValidate : ca_fd.js.validate(_val);
the above is set to only allow the time range between 1:00am to 7:00am .