Sorry about That, Chief
This is another of those tricky days where you have to try to intentionally do something unintentionally.
I know. It's complicated.
Unintentionally Give Someone the Wrong Contact Information Day really exists to give you and "out" when you mess up and give someone an incorrect email address or phone number or street address or something similar.
If you do this some other day of the year, you are permitted to count it as if you had celebrated this day properly. I guess the rationale is that you hopefully don't do this very often, so when you do, it should still count for something.
If you are on the opposite end of such a faux pas, don't just let it sit there. Write back or text the sender and tell them they screwed up (nicely). I've done this a number of times and always get a nice response from the sender.
Be a friend. Help someone send.