On February 19 (Wednesday) at 12:00 (Moscow time), the Sandbox server will be stopped. You have 1 day left to get the Sandbox rewards for playing 55 battles:
On February 19 (Wednesday) at 10:00 (Moscow time), the Second General Test of Update 1.8 will also be stopped to install the update.
On February 20, the 3rd General Test of the 1.8 Update will be released in the evening. It will bring new content.