For those not familiar, 'Wear Your Old Band T-shirt To Work Day' encourages exactly what you think it would - reaching in the furthest depths of your wardrobe and pulling out that old band shirt you used to rock so often back in the day, and wear it to work. This year's festivities fall on 22 November, and BBC 6 Music will be taking part in the holiday. You can find out more about the day below: