Do not dress extravagantly

We're familiar with the 'Keep calm, carry on' British war propaganda poster, and how it's turned into a contemporary classic. By 'contemporary classic', we could also mean 'tired and dated' but that's just down to how ubiquitous it became. I'm not convinced the same will happen with this poster, but you could see how it could be contemporarily used. It's from the Imperial War Museum and was used in the 14-18 war. All about the war effort and all that, but you can't help but wonder how it could be applied today.