Just noticed this, which may or may not be anything.

Elsa Raven who played the "Save the Clock Tower" lady from Back to the Future died yesterday on the 5th.

What day did Marty arrive in 1955? Nov 5th, 1955.

https://www.the-sun.com/entertainment/1750059/elsa-raven-dead-actress-back-to-the-future-titanic/

https://backtothefuture.fandom.com/wiki/1955