Today is Shiha / Shiwa no hi!
For people who have no idea what I'm talking about, the word for wrinkle, shiwa (shiha) is a pun on today's date 8/4, or as is written in Japanese (year, month, date). Shi Gatsu (4 month) Hachi Nichi (8 day - usually pronounced you-ka, but due to historical Chinese/Japanese pronunciations, it can be read either way.
I will keep an eye out for beauty salon advertisements trying to cash in on it.
Meanwhile, Enjoy the wrinkles!
I've been trying to think of other dates that are puns but am coming up short even though there are several. One of the more famous ones is 29th of every month is "Meat Day" ni (2) - ku (9) = niku = the Japanese word for meat. 11/11 has been dubbed Pocky day because the straight lines of 1111 look like pocky!