Why Is Friday Called "Flower Friday" in Japanese?

Last week, one of my students struggled to remember the Japanese word for Friday.

She knew all the days of the week and could say them in order. But when I asked her for Friday, she had to mentally go through the whole week before she could remember it.

Then I remembered an old Japanese expression: 花金 (Hanakin).

I introduced it as a memory trick and explained that it comes from 花の金曜日 ("Flower Friday").

The expression became popular in the mid-1980s, when the five-day workweek was becoming more common in Japan.

Before then, many people still worked on Saturdays, so Friday night was just another weekday evening. As the five-day workweek spread, Friday night became the real beginning of the weekend—something people could look forward to. That's why it became known as 花の金曜日 ("Flower Friday").

The interesting part is the word 花 ("flower").

In Japanese, 花 doesn't always refer to a literal flower. It can also suggest that something is special, exciting, or outstanding. That's why expressions such as 花金 (Hanakin), 花形 (hanagata, "star performer" all use the character 花.

For my student, 花金 became more than just an interesting expression—it became a memorable way to remember the word for Friday.

Moments like this are one of my favorite parts of teaching Japanese. They remind me that learning a language isn't just about memorizing vocabulary or grammar. Sometimes, understanding the story behind a word is what makes it stick.