Heninng von Holtzendorff promotion to Grossadmiral

[Kriegsmarine Admiral]

When was Holtzendorff promoted to Grossadmiral?

Hildebrand & Henriot's "Deutschlands Admirale 1849-1945" give the date of promotion as 31 May 1918
All Internet sources give the date as 31 July 1918
Which one is correct?
Danke!

[joern]

Hallo,
laut Ehrenrangliste erhielt v. Holtzendorff sein Patent am 31.7.1918.
Grüße Joern

[Kriegsmarine Admiral]

Hallo,
laut Ehrenrangliste erhielt v. Holtzendorff sein Patent am 31.7.1918.
Grüße Joern

Hmmm, that is interesting. I was given this document:
Marine-Verordnungsblatt Nr. 19, published 15 August 1918.
It says he was promoted per cabinet order of 31 May 1918.
But is it possible he recieved the patent on 31 July 1918?

Can you post the entry from the Ehrenrangliste?
Danke

[joern]

Hier der Auszug aus der Ehrenrangliste.
Grüße Joern