I'll wait a few more days, perhaps @Zoran, create a tool to replace these components more easily. I have several projects to upgrade.
Okay, I created this utility.
Here it is, attached to this post. Compile and run the application and please tell us if this solves the problem.
Note:
With this tool the conversion should run very smoothly if you don't have mixed old ZVDateTimeCtrls and new DateTimeCtrls dependencies in your project. However, if you have, you will encounter double references to DateTimeCtrls, which you should then correct manually.
Regards, Zoran.