I just read a review that was dated 12/21.

when the year changed from 2020 to 2021.  When you write a review, you have to choose from two drop-down lists, one for month and one for year.  The default is to the current month and year if you do nothing.  The review probably went up in 2021, but the reviewer actually saw her in December 2020.  He changed the month to December, but forgot to roll back the default year.  I've come across a half-dozen or so in the past 9 months.  So to answer your question, no, there is no time machine.  Lol

But of all the things I worried about related to review and approvals the date really was not one of them.

I think you must have caused that to be fixed.

I've been trying to tell you!!!!
 
Haha.

I guess we don't have to worry about the integrity of the time line for now.