The maintenance release 15C.2, was deployed February 19, 2016.
The Oracle Learn Release schedule for the year has been updated, and can be viewed in the Knowledge Management document. This will include the release of version 16A to all production sites on Friday, March 18, 2016 during the normal maintenance hours. You can view an overview of what is new in 16A on the Human Capital Release Readiness page.
Release Notes are expected to be available 2 weeks prior to the release and will be posed on the Release Updates section of Customer Connect. There is a live overview event on March 8th for those who wish to attend.