The default value for the date fields in the 'Add Custom Learning' pop-up needs to be changed to a fixed date or to MM/DD/YYYY:
The default value for date fields, in this pop-up, are configured in the Learning template.
If you wish to have it changed you can open a ticket with Support, detailing which date you wish to have displayed, or if you wish to have DD/MM/YYYY displayed.
See internal memo for details of code change
Default value, Date field, Custom Learning Activity , KBA , LOD-SF-CDP , Career Development Planning , LOD-SF-PM , Performance Management , How To