The AEU is a cohost of the third annual HumanLight virtual Celebration.
It is happening (today) December 17th at 4 pm.(it is a bit confusing because on the sight it also used December 23 for a date - as that is the "actual" day that you might want to celebrate on our own or with your own group.)
This is a new festival to me, but it might be something you feel fits your values and idea of how to celebrate this time of year. It's not one of the other fesitival during the season, but a new one.
Want to know more? Read the FAQ here. But to participate, you do need to register which you can do here on the HumanLight site.