I can’t adjust the Time zone

For some reason I can’t reset the timezone of the game. In this case, at the time of the message’s posting, it is stuck in Moscow time as I was in Russia for vacation. Now I am trying to change it to Beijing time, where I am now.
Proof

Have you changed your timezone recently? To avoid certain exploits we limit how frequently you can change this setting.

You have to wait like a month to change it again. I think there was a warning when you changed it.

Its probably done that way to avoid people changing their time zone over and over to get PvP and store resets.