Hello Luo
Before creating edition for CC and PC, you must check the back end data and its validity. Download the entire data based on valid from and valid to date and then start creating editions.
The first edition will have validity to 9999 but once you release the previous edition and create new, your validity will change accordingly.
Make sure you start creating from old to new. Then in that case you will able to create edition in future date too.
Kiran