My activity timeline says I created a wiki excerpt for in 2016 (I did in 2019). I registered on SE in 2017.

How did SE manage to read 9 upside down?

  • 5
    $\begingroup$ Wait, you still believe time is linear??? $\endgroup$
    – Asaf Karagila Mod
    Apr 27 at 11:58

The following old bug report on Meta SE seems to be identical to what you observed: Activity log entry before registration date.

Though that report is marked , it seems that there is a regression of this bug on at least two other SE sites:

Looks like we can now add Mathematics SE to this list as well.


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