Many learners say "in Monday", "on the morning" or "at July", because their own language uses one word for all of these, or a different word in each spot. Others translate "since three hours" straight from their language, when English needs "for three hours". Today you get one simple system for at, on and in, plus the small time words around them: in time and on time, by and until, during, for and since. In this episode: • The size rule: at, on, in • The odd ones: night and the weekend • In time vs on time, by vs until • During, for, since • A kitchen scene • Practice • Self-check questions with answers Key phrases from this episode: at 6 — a clock time at noon — twelve o'clock in the daytime on Monday — a named day on my birthday — a special day on May 3rd — a date in July — a month in 2027 — a year in the summer — a season in the morning — a part of the day Dinner's at six-thirty. — neutral We're going to the beach on Saturday. — neutral See you next Friday. — not "on next Friday" I called her last night. — not "at last night" in the morning, in the afternoon, in the evening — but at night The baby wakes up at night. — during the dark hours Let's go grocery shopping on Sunday morning. — neutral on the weekend — the American way on weekends — every weekend, as a habit: We sleep in on weekends. at the moment — right now: I'm really busy at the moment. on time — at the planned time, not late: The bus is never on time. in time — early enough for something: We got home in time for dinner. just in time — at the last moment: You're just in time, the pizza's here! Season 2 · Real American English: the complete spoken course for learners worldwide — accent, everyday grammar, prepositions, articles, phrasal verbs, idioms, slang and real conversations at home. Listen, repeat out loud, then take the 52-question quiz. Audio voiced with AI from an original script by Dr. Rashmi R Nair.