A commemorative day estabished by the Pearl Company —which develops glasses-related articles— on this day because of the pun!
The pun: cleaner with Japanese pronountiation is kuriinaa → ku(rii)na(a) → ku (9) na (short for nana, 7)I can feel...Damn it! My see-through glasses got cloudy and I can't see well!If only I had some cleaner with me at a time like this...!