Stack Exchange uses relative timestamps to indicate when an action occurred; a question was asked, edit was made etc. This is done as far back as "2 days ago"; anything prior to exactly 48 hours ago uses the full timestamp. If the timestamp is not in the current year it includes the year.
However, with the advent of a new year this seems to create a dissonance between dates, which occurred exactly two days ago as they jump from "2 days ago" to last year.
This screenshot was taken at 13:23:55 (UTC). I used Stack Overflow as it has the most questions but it's true for all Stack Exchange sites.
As 2012 was last year the year has been added to the timestamp, which makes it seem, to me, that the question was asked longer ago than it actually was.
If there's no need to include the year is it more understandable for a user to not see it? I.e. if it is the 20th June 2013 should the timestamp for dates after 20th June 2012 not include the year portion?