So everyone knows, lights going out on a timer at 11:00pm is not normal. No it hasn't happened regularly in the past. It normally only happens when a president dies. There was an exception while Trump was in office during the DC riots they turned out the lights a few nights to deter the crowds. Just know, it's not normal no matter what the sheep tell you it is. Here's some timestamped photos after 11:00pm with lights on. Feel free to use and share.
it's ridiculous.
the light on the 2nd floor right side never ever goes out.
the lights Inside may go out for the night but not on the outside. like you said, only during the DC riots or a death