Hello Kitty 2012 Mini Wall Calendar. The Hello Kitty brand has been in existence for a number of years, but rose to major prominence in the late 1990’s when superstars such as Mariah Carey adopted Hello Kitty as a fashion statement. If you are a Hello Kitty fan and have many of the collectibles, then make sure you get this official 2012 mini wall calendar featuring some great Hello Kitty images and a special illustrated calendar grid!