Re the Russian Revolution…
I’m fairly certain (I could be wrong, however) that this is because the date came out in October in the Julian Calendar.
Yes it is, Russia did not adopt the Gregorian Calendar until after the revolution. (The British empire did in 1752). The Catholic countries started in 1582. If anyone really wants to know way to much about calendars please ask. I have been researching the subject on and off for some time.
As for Hebrew national last I checked it was under the triangle-k. Though It has been some time as I have not been in the USA in several years.