People can't agree on where the oldest sidewalk stamp is in Toronto Stay in the loop Sign up for our free email newsletter. Unsubscribe anytime or contact us for details. People walk on them every day but not many look down and notice the stamps pressed into many Toronto concrete sidewalks. The stamps are normally put into the concrete by the contractor or the city and include a date. Contractors stamp sidewalks with a date and name of their company. The date on one Toronto sidewalk caught the attention of one pedestrian recently who posted the find to Reddit. The person thought the sidewalk stamp date is 1893, and guessed it might be the oldest dated sidewalk in the city.