Buy British Day is observed on October 3 each year in the United Kingdom and the United States. The day aims to promote British brands and businesses, encouraging consumers to support locally produced goods. Its origins trace back to the 1960s with a campaign called "I'm Backing Britain," initiated by five secretaries who worked extra hours to boost productivity. This movement gained significant public attention and was later revived in 2014 by the organization Best of Britannia, which organized a dedicated event in Clerkenwell, Central London. Typical customs for this day include shopping for British-made products and celebrating British culture. The day serves as a reminder of the importance of supporting local economies and fostering national pride through consumer choices.