After being hauled over from the US, Black Friday is now arguably bigger than Boxing day for bargain-savvy shoppers.
Once upon a time, shoppers had to wait until after Christmas to score the bargains as shops reaped in the Christmas profits.
Now, though, things are changing as Black Friday has flown over from America and been picked up by British retailers, online and on the high street.
Simon Read, personal finance editor for the Independent, explains how the day came about, and how you could be savvy in the sale.
Amazon led the charge four years ago but this year will see countless shops taking part, including Asda, Sainsbury's and Apple. It is the only day of the year Apple run a sale.
John Lewis are even putting on more staff to cope with the expected increase in sales. Tesco are expected to discount prices by up to 70%.
Jake Tupman went to see what all the fuss is about and how this Thanksgiving hangover cure became a British calendar stalwart.