The sale is rolling by timezone. As I type this in, the sale will be starting in about 9 hours 15 minutes from where I live.
So, that was all China.
Aliexpress is getting bigger in the US. It is the same factory sources as many US companies, so the build quality is very similar and the prices are often significantly less. They also reflect the chinese tech market and that can be several years ahead of the US domestic sales market.