How to add time to Canon SLR photos?

Canon SLR can't automatically add time to print, but can only be added through later software. Time stamp is a product of the film age. In the digital age, photo files contain EXIF information, including shooting date, time and main exposure parameters, so there is no need to add a time stamp on the photo screen. From the perspective of professional photography, time printing will destroy the integrity of photos, which is despised by professional photographers. Canon, Nikon and other senior photographers despise the time printing function. Only the "Dafa" that started with toys will increase this redundant function.