Problem still persists after a reboot. Adobe Reader version 2015.023.20053 Windows 7 Professional 64 bit.I saw the problem happen on my system. I opened the form and was able to input 01/01/2017 in a date field. I then closed Reader and it updated to version 2015.023.20053. Opened the form again and could not enter 01/01/2017. It reverted to 01/01/2016. I used both the keyboard and the date picker.