I couldn’t believe this when I saw it on The Tonight Show so I did a little research that this was an actual item and can be found at DayClocks

“Every home should have DayClock. They are made for those who don’t care about what time it is, but who need to know what day it is.”

Thats an actual sales point for the Day Clock found on the Who Should Own A Day Clock section.
So if you are the type of person who doesn’t care about what time it is go ahead and check their site out, you probably don’t have too much else to do.