ISU-130 tier VIII Premium TD is available as early access in the NA premium shop (previously it was available only on the ASIA server). The vehicle was a prize for World of Tanks moderators and people who helped in the development of the game.
It will probably be available on EU soon.
January 26. is Australia Day. This style will be available on EU.
Probably available only on RU server on 23. February.
This style will be available in patch 1.4 probably for all regions. Chinese New Year is celebrated on 05.02.2019.
BTW 2019. is a year of Earth Pig which will bring luck to all of us overweight and obese WOT players 🙂