“License Sticker Expiration Ticket”

Unfortunately I recently received a ticket for an expired license sticker. Long story short the car used to be registered to someone with a birth day of July. The car was then transferred over to me, properly at a service Ontario, and my DOB is late August. I was always told that the license sticker expired on your DOB regardless of what the actual sticker said. Perhaps I should have investigated before taking the advice of a friend, but does this have any validity to it? Or should I just be paying the ticket? I don't think it changes anything but I did not receive a reminder letter as well to make things worse (seems there was a glitch for July renewal letters). Thanks very much.

Why do you still have the previous owners plates on the car? Was it a family vehicle where the plates were transferred to you as well? Your correct in that plates typically expire on the registered owners birthday, but for it to apply to the new owner youd need to get a new validation sticker, etc.