Postcard calendar / calendar

Calendar records the passing of time. When we turn a new page, can we still retain the last one and make some meaningful things?
The front of calendar is left empty for recording the happy or sad memories during the month. The back is designed as postcard, which can be mailed to distant parents and long-lost friends for sharing the past time with them. In the busy society of network and information, the simple truth brought by letters is precious and unique, reflecting the exchange of real emotions. The postcard can also be sent to yourself for memories!