Please see this related thread: http://lithosphere.lithium.com/t5/developers-discussion/Blogs-changing-the-post-date/m-p/90644
It looks like the call to change a message/article date is actually mis-documented and does not work as expected. We'll fix this in the docs and look into fixing this as soon as possible.
We're also working on importing our Wordpress Blog into Lithium.
IzabelaU: Has the documentation been updated, as you mentioned?
kcrawford: Did you end up completing your Wordpress import? If so, how did it work out? If you're willing, any code you're willing to share from the Wordpress-Lithium API import would be much appreciated to get a jump start.
Hi iftomkins,
The documentation has been updated in that we have removed message.post_date as an accepted parameter. This means that filing a support ticket is still required to edit the post dates. Please post an idea for this to our idea exchange. I know this would be useful for many customers.
