In a day or on a day? What’s the difference? And what about on the day? In a day means in the duration of a day (24 hours). The expression is used when an event or action happens within the duration of a day. Here’s an example: Suzy
Non-native English speakers often have difficulties in choosing between two different prepositions, articles, or other parts of speech. In this series of blog posts, we aim to help making the right decisions.