Currently our Game Masters and developers are looking into an issue that causes some warning EVE mails and notifications that contain both dates and the name of a day (for example mails that remind you when a structure will come out of reinforced mode) to display inaccurate information. As of now the actual date (for example May 15th) seems to be correct in all cases, however the name of the day (for example Wednesday) may be inaccurate.

We are still looking into the matter, but as a precaution we advise everyone that receives these mails to double check the information as presented.

For further information please refer to this forum post.