Fans are asked to dig out their old shirts and show their colours, whether they be red and white or something totally different from the back catalogue, which includes ruby, yellow, black and blue and even a Netherlands-inspired orange number from 2001/02, which was not popular with current Robins boss Russell Milton!
A signed match programme and team sheet will up for grabs for the best 'chelfie' taken inside Whaddon Road on Saturday.
We also want to hear what your favourite kit has been over the years, maybe the Arsenal style Gulf Oil shirt from the late 1980s, which was red with white sleeves and famously worn by Andy Gray, or the 125th anniversary all ruby version. from 2011/12 which so nearly saw the Robins promoted to League One under Mark Yates.
Tweet @CTOfficial using the hashtags #chelfie and #retrokitday and we will annouce the winner on Saturday evening.