Step off the plane in China and there is no doubt about what day it is - Singles' Day.
It's hard to escape the sale buzz - billboards, the airport arrival hall, malls, hotel elevators - the advertisements are everywhere.
And the numbers are astounding: more than 140,000 brands offering 15 million product listings to hundreds of millions of consumers. The annual sales event dwarfs its Black Friday or Cyber Monday equivalents in the United States.
Last night, e-commerce giant Alibaba lived up to the hype. Oscars producer David Hill was responsible for the gala event that counted down to the start of the shopping extravaganza. Held at Shanghai's Mercedes-Benz stadium, the event was broadcast on three TV channels and featured American rapper Pharrell Williams, British singer-songwriter Jessie J and former world number one tennis superstar Maria Sharapova - plus 100 or so other celebrities.
"If you analyse why we are doing the show, it's to turn shopping into sport and to make shopping into entertainment, so the show has got to reflect that philosophy. And the way the show is constructed - with so many segments, so many stars and fun bits - it reflects the overreaching theme of what Singles' Day has become," said Hill.