Q has mentioned Red October many times.

As a previous post noted here - "Rig for Red" is a submarine term.

Here's a short (5 second) clip of the line as heard in the movie THE HUNT FOR RED OCTOBER

RIG FOR RED clip

Red October is also the name given to the October Revolution (Bolshevik) that took place on October 25, which is actually November 7.

(Old Style vs New Style dates)

From Wiki on "Red October"

The revolution was led by the Bolsheviks, who used their influence in the Petrograd Soviet to organize the armed forces. Bolshevik Red Guards forces under the Military Revolutionary Committee began the occupation of government buildings on 25 October (O.S.; 7 November, N.S.), 1917. The following day, the Winter Palace (the seat of the Provisional government located in Petrograd, then capital of Russia) was captured.

I don't wanna datefag but perhaps Q is pointing to Thursday Nov 7.