I received a "Congratulations, you've earned 2 SWUs... and you have a chance to earn two more!" on 12/31. Pretty sure I couldn't plan and take a flight in those last few hours of 2018 for the additional 40,000+ EQM.
Although I'm starting to doubt if AA even looked at my account before personally writing me a note, as I think the text may have been generated by a computer program without any human intervention.