Yes! It's not the first time I posted a rant on the net and found myself guilty of the sin the very next day. This time, a web app of mine has big tables full of dates, and I didn't quickly figure out a way to show the full date without too much clutter. So, I used "dd.mm" and postponed a finer design till next year. Guess what, this UI element hasn't changed in the next three years and today I finally stumbled on a bunch of records which really can't be deduced from context.