Time zone change is not saved

I am quite sure I changed the “country” and “time zone” field in my profile right before leaving for Bulgaria where I am now. However, I have just realized that the time zone showed in my profile was still GMT+0200 Europe/Rome. I have tried to change it to GMT+0300 Europe/Sofia, but in vain. What’s happening? Yesterday, I thought my student was one hour late, but the matter was my time zone settings were wrong…

Well, everything looks fine now!