Many of the date pickers in the Syllabus tool have been updated to the new datepicker. See
SAK-25369 . However the date picker for individual syllabus items was not able to be updated because the structure of the syllabus html is not compatible with the new datepicker. (feel free to make this summary clearer).
Therefore I'm opening up this new Jira, but apparently it involves more than just updating the date picker, some additional work on the Syllabus display itself is needed?