Wrong dates in snippets for some Google news sites

[johoney]

The site is crawled regularly and is published in Google news several times daily. However in the SERPS if you search for a 'keyword + news' it shows a date that is several days older than the date of the last indexing.

Why would that be and can it be controlled?

Cheers

[tedster]

I've seen this kind of date bugginess too, and I have no idea how a webmaster might influence it, except possibly by employing microformats [webmasterworld.com].