The FP6 Euromatrix MT translation project has a matrix of language resources for all of the European Union Languages including parallel corpora. See http://www.euromatrix.net/euromatrix
The JRC-Acquis Multilingual Parallel Corpus which is available at http://langtech.jrc.it/JRC-Acquis.html contains parallel texts for 22 EU languages.
Finally, there is the EuroParl corpus which can be found the University of Edinburgh, at http://www.statmt.org/europarl/ .
For the dates of publication, you will need to check each url above.
2008/7/14 bruno cavestro <cavestro.bruno at gmail.com>:
> I am looking for an almost exhaustive list of existing parallel corpora.
> + infos on the date of pubblication of each corpora
> Best Regards
> Corpora mailing list
> Corpora at uib.no