Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
For example, how do you say:
It's quarter to 3.
It's quarter past 3.
A quarter to three is 2時45分 (にじよんじゅうごふん), and a quarter past three is 3時15分 (さんじじゅうごふん).
If we want to emphasize the difference from three o’clock, we can say “3時の15分前” and “3時の15分後,” but this is not the usual way to state the time.
In Japanese, there is probably no simple expression for a quarter hour. You have to say 3時15分前 or 3時15分.
For a quarter century or quarter period, there are expressions 四半世紀, 四半期.
Required, but never shown