Prepositions of time help us say when something happens, how long it lasts, and when it will happen in the future. In English, we use words such as at, on, in, for, and since. Italian expresses similar ideas, but the choice of preposition is often different. For example, English says on Monday and at eight o'clock, while Italian normally says lunedì and alle otto. Understanding these differences is important when talking about daily routines, appointments, schedules, and future plans. Italian also has many common time expressions that do not require a preposition.
Expressing When Something Happens
The preposition a is commonly used to indicate a specific time. With clock times, it combines with the definite article to form alle, as in alle otto (at eight o'clock) or alle dieci (at ten o'clock). The main exception is all'una (at one o'clock), which uses the singular article. Italian also uses a in expressions such as a mezzogiorno (at noon) and a mezzanotte (at midnight). These forms are especially useful when describing daily activities or arranging appointments.
La lezione comincia alle nove. — The lesson starts at nine.
Pranzo all'una. — I have lunch at one.
Ci vediamo a mezzogiorno. — See you at noon.
When talking about parts of the day, Italian often uses di in expressions such as di mattina (in the morning), di pomeriggio (in the afternoon), di sera (in the evening), and di notte (at night). These expressions are common when describing habits and routines. In particular, di notte generally refers to nighttime as a period or to something that happens regularly, while stanotte refers to a specific night. Other frequently used expressions include stamattina (this morning) and stasera (this evening or tonight). These forms do not require a preposition.
Studio di mattina. — I study in the morning.
Esco stasera. — I'm going out tonight.
With days of the week, Italian normally uses no preposition when referring to a particular day, whether in the past or the future. For example, lunedì can mean on Monday, with the verb indicating when the event happens. When describing something that happens regularly on the same day, Italian commonly uses the definite article: il lunedì means on Mondays or every Monday. This difference is important because the same day name can refer either to a particular occasion or to a repeated activity.
Vado a Roma lunedì. — I'm going to Rome on Monday.
Il lunedì lavoro. — I work on Mondays.
Months, seasons, and years also have common patterns. With months, Italian often uses a or in, as in a gennaio or in gennaio (in January). With seasons, in is very common, as in in primavera (in spring) and in estate (in summer). For years, Italian normally uses in combined with the definite article, producing nel, as in nel 2026 (in 2026). These expressions are useful when talking about birthdays, travel plans, and important events.
Parto a luglio. — I'm leaving in July.
In estate fa caldo. — It's hot in summer.
Sono nato nel 2000. — I was born in 2000.
Expressing Duration and Future Time
Italian uses da to describe an action or situation that began in the past and continues in the present. It often corresponds to English for or since. An important difference is that Italian normally uses the present tense in these sentences, while English often uses forms such as I've lived or I've been studying. For example, studio italiano da un anno means I've been studying Italian for a year. The action started a year ago and is still continuing. The preposition da can also introduce a specific starting point, such as da lunedì (since Monday).
Studio italiano da un anno. — I've been studying Italian for a year.
Abito qui da gennaio. — I've lived here since January.
The preposition per indicates how long an activity lasts or is planned to last. Unlike da, it does not necessarily mean that the activity began in the past and continues now. It simply describes a period of time. This distinction is useful when talking about travel, activities, and plans. Finally, tra and fra are used to indicate how much time remains before something happens. Both mean in when referring to a future moment, and they are interchangeable. These expressions are especially common when talking about appointments, departures, and future activities.
Resto a Roma per tre giorni. — I'm staying in Rome for three days.
Il treno parte tra dieci minuti. — The train leaves in ten minutes.
Torno fra una settimana. — I'll be back in a week.
Summary of Italian Time Expressions
| Preposition or form | Main meaning | Common use | Example |
| a / alle / all' | at | Clock times | alle otto — at eight |
| di | in, at | Parts of the day | di sera — in the evening |
| a / in | in | Months | a marzo — in March |
| in | in | Seasons | in inverno — in winter |
| nel | in | Years | nel 2026 — in 2026 |
| No preposition | on | Particular days | lunedì — on Monday |
| il + day | every, on | Repeated weekly activities | il lunedì — on Mondays |
| da | for, since | Actions continuing in the present | da due anni — for two years |
| per | for | Duration of an activity | per tre giorni — for three days |
| tra / fra | in | Time before a future event | tra un'ora — in an hour |