I dont think its about the timezone being shared specifically. Its that your timezone can be a part of the puzzle used to track and identify you.

Ad companies dont need to know your name to know who you are. They just need to be able to track your online habits and they can build a digital signature that is you, and they can target that signature and know what to advertise without knowing who you are.

Thats what the government say, but its absolute bullshit.

Thankyou!

Still, its quite widely spread and well known. You not knowing about it is more unbelievable than the majority of people not knowing about it.

Can anyone take a screenshot of this and post it please? Imgur is blocked in the uk and even using a vpn doesnt seem to fix it for me.