Since SotR Update, 10+ second freeze at midnight (EST)

[ZeCabbit]

Ever since the Spectres of the Rail update, every night that I'm playing, at exactly the time that my computer flips to midnight (EST), the game will freeze for about 10-15 seconds.  This freeze will cause me to disconnect from any host I'm playing with at the time, or if I'm host, to cause all other players to disconnect from me.

Game does not crash or otherwise fail once the freeze is done, and normal (albeit solo) play resumes.  Other players can join me if objectives are not completed, as if I were a normal host.

 

OS: Windows 7, 64-bit. 

CPU: i7-3770K (3.5Ghz clock, factory default)

RAM: 24 gB

GPU: AMD Radeon HD 7900 Series (Driver is older, at 9.12.0.0)

Version of game:  At least SotR Hotfix 0, 1, 4, and 12

Game is ran in borderless full screen, 1920*1080, 60hz.

I could not recreate the incident by setting my clock to just before midnight manually.

I have not noticed other abnormalities on the system at that time.