BBC television programmes used to give the year in Roman numerals, in the copyright notice, I think. It has been suggested that this was to make it harder for people to notice how old the programme was. The same technique wouldn't work so well on a web site because you couldn't do what the BBC did and leave the Roman number on the screen for about 0.5 s so that most people don't have time to decypher it. Also the dates at the end of the last century were particularly hard to read in Roman. Here's an example. Time yourself:

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