I am moving my blog to a new URL and Host. I want to keep 30 posts and want to backdate these to the original posting date on the old blog. I know how to do it via copy and paste datestamp and publish. But since my NEW URL started in Jan08 is it ok to have posts dated back to Aug07 and published? Note I tried to just "save" them but they function then as drafts and don't appear on the site.
NOTE: The issue is not if it can be done but if this will trigger a penalty. There is no attempt to create duplicate content as the old blog will be taken down within a few weeks once all post to be moved have been cut and pasted. The "issue" is that the posts have to be back dated to a date that is older than the new Domain Name!