If you wish to change news publication back date, I would suggest taking a look at this blog post
. This should guide in you in changing the news date.
Please let us know if you have anymore questions.
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