Hadar Shemesh breaks down when to use at, on, and in for time. At marks exact clock times like 9 AM. On goes with days and dates. In covers broader stretches: mornings, months, seasons.
At most specific, on less specific, in least specific. So when you schedule a meeting, you pick a certain hour. That is the most specific time that you have in the calendar, and this is when you use at because at is used when you indicate a specific time. At 9 AM, at 3:45, at 8 PM. On is the columns in your calendar. Meaning days and dates. On Wednesday the 5th. Let's meet on the 4th of July. Let's meet on April 15th. And then we use 'in.' 'In' is the least specific, so we use 'in' to indicate a specific time within a larger time frame where you don't want to commit to exactly when. For example, let's meet in the morning. So 'in' is a specific time within a larger time frame. Let's meet in the afternoon. Afternoon is again, like you have a few options there, but you don't want to commit to when and you say 'in.' You can also use it when you talk about months. In August. In July.
Read Out Loud with me! Dare to Lead by Brené Brown | Pronunciation & Vocabulary practice
