The prices are in US dollars.
The marketing is in English.
The only domestic warehouse of significance is the one in the US.
The holiday sales are based on US culture
Just noting
@nightprowler7's suggestion sale timing be based around US working schedules is hardly an act of xenophobia, but following the prudent pattern of catering to the market that clearly matters far more than the rest.
Twenty years from now we'll probably be running the pricelists through a mandarin-English translator and waiting for the Year of the Snake sale, but for now, this is how it is.