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.
It rained the whole day yesterday.
He plays games all day long.
More formal and often used in written language or official contexts. Means 'all day' or 'throughout the day'.
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.
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').
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.
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'.
To emphasize the span from morning to night, often implying continuous activity.
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').
I slept the whole day.
That work took up the whole day.
The kids played outside from morning till night.