RU and EU (no NA news yet) will be getting a micropatch overnight. There is little  information about the content of the Patch. Downtimes are as follows.

• For RU: On February 12 game servers and clan portal will be unavailable from 6:00 to 6:45 (MSK).
• For EU: The World of Tanks servers will be unavailable on 12.02.2019 from 05:00 – 05:45 CET, Clan Portal (eu.wargaming.net/clans) will be unavailable from 05:00 CET 12.02.2019 till 05:45 CET

Patch Contents.

•   A new folder for modifications will be added, as well as fixes for some technical errors.