Translation guide
Expresses the idea of an entire day, from morning to night, or all day long. Japanese uses several common phrases depending on nuance: duration, habitual action, or emphasis on 'the entire day'.
To say that something lasted or will last for the entire day, emphasizing continuous duration.
The most common and natural way to say 'all day long' or 'the whole day'. Used for continuous actions or states throughout the day.
昨日は一日中雨が降っていた。
It rained the whole day yesterday.
彼は一日中ゲームをしている。
He plays games all day long.
More formal and often used in written language or official contexts. Means 'all day' or 'throughout the day'.
終日営業しております。
We are open all day.
Emphasizes a full 24-hour day, often used when talking about spending a whole day on something or a complete day off.
丸一日かけて掃除をした。
I spent the whole day cleaning.
To express that something happens every day or on all days, as a routine or habit.
Means 'every day'. While not exactly 'the whole day', it's often used when English speakers might say 'the whole day' in a habitual sense (e.g., 'I work the whole day' meaning 'I work all day every day').
私は毎日働いています。
I work all day every day.
Means 'almost every day' or 'as if every day'. Used when something happens so frequently it feels like every day.
彼は毎日のように遅刻する。
He is late almost every day.
To refer to the whole day as a single block of time, often in contexts like 'I have the whole day free' or 'It took the whole day'.
Literally 'one day, all of it'. Casual and emphatic, used in speech.
今日は一日全部空いてるよ。
I'm free the whole day today.
As above, emphasizes a complete day. Often used with verbs like かける (spend) or つぶれる (be wasted).
その仕事に丸一日つぶれた。
That work took up the whole day.
To emphasize the span from morning to night, often implying continuous activity.
Literally 'from morning to night'. Very common and natural.
朝から晩まで働いた。
I worked from morning till night.
Similar to above, using 夜 (night) instead of 晩. Slightly more modern/casual feel.
子供たちは朝から夜まで外で遊んでいた。
The kids played outside from morning till night.
Do not directly translate 'the whole day' as 全体の日 or similar. It sounds unnatural. Use the phrases above depending on context.
一日中 is everyday spoken Japanese. 終日 is formal/written and often used in business or announcements (e.g., 終日禁煙 'no smoking all day').
一日中寝ていた。
I slept the whole day.