We have introduced such functionality (Backdating content items) in our Sitefinity 4.3 release, however if there are certain reasons why you need to stay on previous version, you can still achieve the desired functionality. Please find a discussion and code samples which we've provided on the topic on this forum thread
, I believe you might find it useful.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items