I just updated to InDesign 2020 on 12-27-2019 and today (12-30-19) was updating some ID documents that have a text variable in the master pages (defined as Year > Modification Date), which suddenly (a few days premature!) is now showing up as 2020, even though we're still in 2019! I thought that changing it to Year > Output Date (which changes the field to show the correct 2019) was a temporary solution, but then my new PDFs output with the date field changed to 2020! ANY document I generate a new PDF from now automatically changes the date field to 2020 in the PDF, even if it still shows 2019 in the ID file.

Do I have to live with this for just a few more days, or in 2020 will my Year variable fields all move to 2021? This is definitely a bug, since before upgrading to CC 2020, I had never had this probably occur before; the years changed when the ACTUAL year changed. Any ideas WHY this is happening now?

(I'm on a MacBook Pro (15-inch, 2017) running Catalina 10.15.1 and InDesign 15.0.1)