I had just been thinking somewhat the same about the timing of the repose of Patriarch Nikon of All Russia [ + 1681 ], the 7th Russian Patriarch on August 17/30, afterfeast of the Dormition.
So Bishop Galaktion shares that repose day with 'the greatest man in Russian history', according to Met Anthony [ Khrapovitsky ] of Rocor who himself reposed 80 years ago this past August.
I don't see that timing of Bishop Galaktion's repose as by chance, therefore.
Do we have a bio of him ? Perhaps one is being composed.
I tried to follow that link but got stuck on a request for a script from the website ?
Also, where might be Oinoi ?