Was engaging in a bit of cross cultural exchange with Nagano Sensei at school, talking about little phrases used in the US to describe days of the week - Monday Morning Blues, TGIF, etc - and asked him if there was anything similar in Japan. Not really, as it turns out, given the Japanese propensity to, well, pretty much be involved in work 7 days a week, but it lead to one Japanese joke/saying that I now will share with you, the unwashed masses...
What are the Japanese days of the week?
For those of you puzzled, the actual days of the week in Japanese are Getsuiyoobi [M], Kayoobi [Tu], Suiyoobi [W], Mukyoobi [Th], Kinyoobi [F], Doyoobi [Sa] and Nichiyoobi [Su]. When you string a bunch of days together, conversationally, you just use the first syllable. For example M-W-F would be gets-sui-kin.
So the joke, for those of you still paying attention, is that the Japanese week has 2 Mondays and 2 Fridays, with no weekend days.