Readings of “一日
Today, I will talk about the readings of the Japanese word “一日”.
一日の読み方
“一” means “one”, “日” means “day”, but “一日” has two meanings: “one day (24 hours)” and “the first day of a month.”
今日は「一日」という漢字の読み方を紹介します。
When you want to mean “one day,” you have to read “一日” as “ichi-nichi”.
「一日」は「ある日(24時間)」という意味と、「月の初めの日」という大きく二つの意味を持ちます。
On the other hand, if you want to mean “the first day of a month,” you have to read “一日” as “tsuitachi”.
「ある日」という意味を表すときは、そのまま「いちにち」と読みます。
The reason of the irregular readings is to make it easier to distinguish between these two meanings.
一方、「月の初めの日」という意味を表すときは、「ついたち」と変則的な読み方をします。
Also, the etymology of the reading “tsuitachi” comes from “月立ち(tukitachi)”, which implies the beginning of a month.
変則的である理由は、二つの意味を区別しやすくするためだと考えられています。