Duchy of Anhalt-Bernburg

[Ralf]

Princess Friederike of Schleswig-Holstein-Sonderburg-Glücksburg (1811-1902) was co-regent of the Duchy of Anhalt-Bernburg alongside her husband Duke Alexander Carl (1805-1863). Her reign ended with the death of her husband and started in November 1855.
Does anyone know exactly at which day in November it started?

 

[An Ard Ri]

The date is not specified on her Wikipedia page


Princess Friederike of Schleswig-Holstein-Sonderburg-Glücksburg.

https://en.wikipedia.org/wiki/Princess_Friederike_of_Schleswig-Holstein-Sonderburg-Glücksburg

 

[Ralf]

I know that, and that's why I'm looking for a specific date, as so far I have only found month and year.