@devurandom@cybre.space as I remember, there was two capitulations.
One was may 8th, another may 9th.

One - capitulation to Britain, USA and France. USSR ambassador was there but had no permittion to accept such an important step from the enemy.

So USSR insisted to rewrite the capitulation to include soviet side too. On soviet territory and with a high military men having right to accept the fall of the enemy. And that was may 9th in Moscow. First act became pre-capitulation act and the second - full-stack one.

But. AFTER the first act german leader (Karl Denits, I suppose) published a common order to all german soldiers to stop fighting. And that happened 8th in Germany and 9th already in Russia.