PRL Changes Its Publication Dates

Instead of appearing on Monday each week, the print version of Physical Review Letters will now appear on Friday. The print issue will comprise all the articles that were published online during that week. It had already been the case for more than a year that online publication marked the official publication date for each article, and so the new print-version schedule does not affect this policy. (http://prl.aps.org/edannounce/PRLv89i26.html )