You can easily switch between these functions with a simple twist of the top row.
The 3" square cube clock operates on one AA battery and sells for $25.
If you are just looking for a calendar, check out this cool Lego-inspired calendar:
Implications - Consumers in modern society are looking for challenges regardless of what they may be taking on. Products that feature a task before it can function are appealing to those who look for more than just simplicity. Companies trying to increase their level of revenue could develop more of their items with this in mind.