Time and Frequency Expressions | Esperanto Grammar

Esperanto time expressions are built from a small set of reusable frames. The important question is not merely which word means “tomorrow” or “often,” but what relationship the whole expression marks: a clock point, a recurring occasion, a span, or a point measured from now. English uses the same prepositions inconsistently—at five, on Monday, for two hours—where Esperanto distributes these meanings more transparently.

Clock time: estas la... and je la...

To state the hour, use an ordinal adjective because you are naming the numbered hour: Estas la tria. The noun horo is normally understood. Minutes can follow with kaj, or be measured post the current hour and antaŭ the next one.

Estas la oka kaj dudek; la kunveno baldaŭ komenciĝos.

It is eight twenty; the meeting will begin soon.

Estas dek kvin minutoj antaŭ la sesa, do ni havas ankoraŭ iom da tempo.

It is fifteen minutes to six, so we still have a little time.

— Kioma horo estas? — La deka kaj duono.

— What time is it? — Ten thirty.

The fixed question is Kioma horo estas?, literally “Which-numbered hour is it?” Kiomas? also occurs (informal), but is slang-like and unsuitable for neutral formal prose. To locate an event at a clock time, use je. This role marker is especially conventional with hours; do not replace it with the accusative, which could look like a calendar date.

La lasta trajno foriras je la dudek-tria kaj dek.

The last train leaves at 11:10 p.m.

Ĉu ni renkontiĝu je la sepa aŭ iom pli frue?

Shall we meet at seven or a little earlier?

The core is therefore je la + ordinal hour. The variable slot accepts an exact hour, minutes, or an approximation: je la kvina, je la kvina kaj kvarono, ĉirkaŭ la kvina. In schedules, the 24-hour system is normal and internationally clear.

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Keep two frames separate: Estas la sesa tells the time; je la sesa schedules an event. English “at” appears only in the second meaning.

Days and recurring occasions

A bare time expression with accusative -n can mark when something happens. With a day name, both an adverb and an accusative noun phrase are available: lunde means “on Monday/Mondays” according to context, while lundon identifies Monday as the occasion. Adding ĉiu makes recurrence explicit.

Mi laboras hejme lunde, sed marde mi iras al la oficejo.

I work from home on Monday, but on Tuesday I go to the office.

Ni ekzercas nin ĉiun ĵaŭdon post la laboro.

We practise every Thursday after work.

La klubo kunvenas ĉiun duan vendredon.

The club meets every other Friday.

In ĉiun duan vendredon, both adjectives and the noun carry accusative -n because the whole phrase marks a recurring time. Compare ĉiutage, ĉiusemajne, and ĉiumonate: these compact adverbs fill the same frequency role and are convenient when the specific weekday does not matter.

Mi kutime legas la novaĵojn dufoje tage.

I usually read the news twice a day.

La medikamento estu prenata po unu tablojdo trifoje tage.

The medicine should be taken one tablet at a time, three times a day.

Here dufoje/trifoje counts repetitions, while tage supplies the recurring period. Po belongs to the distributed quantity—one tablet on each occasion—not to the number of occasions. See duration and frequency for the numerical system in greater detail.

Frequency adverbs and their scope

The neutral scale includes ĉiam “always,” kutime “usually,” ofte “often,” foje/kelkfoje “sometimes,” malofte “rarely,” and neniam “never.” These generally stand near the verb, but position can shift what is emphasized. The negative correlative neniam already contains negation and does not take an extra ne.

Ŝi kutime respondas tuj, sed hodiaŭ ŝi estas okupita.

She usually replies immediately, but today she is busy.

Mi malofte veturas aŭte en la urbocentron.

I rarely drive into the city centre.

Ĉu vi iam vizitis Islandon vintre?

Have you ever visited Iceland in winter?

Mi neniam forgesas ŝian naskiĝtagon.

I never forget her birthday.

The table words form a coherent contrast: iam is an unspecified occasion, ĉiam every relevant occasion, and neniam no occasion. This is not an idiomatic list but part of the wider correlative system. Foje can mean either “once” or “sometimes”; use unufoje when the exact count must be unmistakable.

Mi unufoje renkontis ŝin en kongreso, sed ni ne longe parolis.

I met her once at a congress, but we did not talk for long.

Duration and distance from now

Three productive frames answer three different questions:

Frame	Meaning	Example
dum + span	throughout or during a bounded interval	dum tri tagoj
span + -n	how long an action or state lasts	tri tagojn
post/antaŭ + span	a point later/earlier than a reference point	post tri tagoj

Ni restis en Gdansko tri tagojn.

We stayed in Gdańsk for three days.

Dum la tri tagoj sen interreto ni finfine ripozis.

During the three days without internet, we finally rested.

Mi resendos la dokumenton post tri tagoj.

I will send the document back in three days.

English “for” tempts learners to use por, but por normally marks purpose or intended benefit, not elapsed duration. The accusative duration directly measures the event. Dum views the period as the setting or interval within which something holds.

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Ask the semantic question first: “When?” favors a time point; “how long?” favors accusative duration; “during which interval?” favors dum; “how much later?” favors post.

jam, ankoraŭ, and ne plu

These words locate a state relative to an expected boundary. Jam says the boundary has been reached (“already/by now”); ankoraŭ says the state continues (“still/yet”); ne plu says it has ended (“no longer”). Their English translations vary with questions and negatives, but the Esperanto logic remains stable.

La gasto jam alvenis, sed la ĉambro ankoraŭ ne estas preta.

The guest has already arrived, but the room is not ready yet.

Ĉu vi ankoraŭ laboras, aŭ ĉu vi jam finis?

Are you still working, or have you finished already?

La vendejo ne plu malfermiĝas dimanĉe.

The shop no longer opens on Sundays.

For a starting boundary, use ekde or de; for an endpoint, use ĝis. Ekde highlights continuation from the start up to the relevant time.

Mi loĝas ĉi tie ekde 2021 kaj restos almenaŭ ĝis Junio.

I have lived here since 2021 and will stay at least until June.

Choosing an explicit or compact frame

Esperanto often offers both a transparent phrase and a derived adverb. Ĉiun tagon and ĉiutage both express daily recurrence; en la mateno and matene can both locate an event in the morning. The compact form is not automatically more informal. It is simply less internally detailed. Choose the full phrase when a determiner or modifier matters: en tiu malvarma mateno, ĉiun duan tagon, dum la tuta semajno. Choose the adverb when the period is an unmodified circumstance: matene, dusemajne, jare.

Matene mi kontrolas la retpoŝton, sed en tiu mateno la elektro ne funkciis.

In the mornings I check my email, but on that morning the electricity was not working.

The same principle explains why semajne can mean “per week” after a number: tri fojojn semajne. The noun-based phrase en unu semajno instead normally measures the interval until completion or the time available within that week. Form alone does not decide every reading; the verb and the counted event contribute.

Ni kunvenas dufoje semajne, kaj ni finos la projekton en unu semajno.

We meet twice a week, and we will finish the project in one week.

For approximate time, put the approximation marker directly before the expression it modifies: ĉirkaŭ la sesa, antaŭ proksimume du jaroj, preskaŭ ĉiutage. Ĉirkaŭ can act as a preposition with a time point; proksimume and preskaŭ are adverbial. Preskaŭ ĉiam means just short of always, whereas ĉiam preskaŭ preta is liable to suggest that “almost ready” is the state that always holds. Position therefore controls scope.

La kurso komenciĝas ĉirkaŭ la unua de Septembro kaj daŭras proksimume dek semajnojn.

The course starts around the first of September and lasts approximately ten weeks.

Ordering events in connected speech

Time expressions also structure narratives. Unue, poste, tiam, dume, and fine do different jobs. Poste places one event after another; tiam points back to a contextually identified time; dume presents simultaneous background activity; fine reaches an endpoint and may imply delay or relief. They are not interchangeable translations of English then.

Unue ni registriĝos; poste ni serĉos niajn ĉambrojn. Dume la organizantoj preparos la salonon.

First we will register; afterwards we will look for our rooms. Meanwhile the organizers will prepare the hall.

Mi ricevis la konfirmon nur vendrede; tiam mi fine povis aĉeti la bileton.

I received the confirmation only on Friday; then I could finally buy the ticket.

In instructions and reports these markers make temporal relations explicit without heavier tense constructions. Esperanto normally lets simple verb tenses and well-chosen time adverbials do this work. A compound tense is not needed merely because one event preceded another.

Common Mistakes

Using an accusative for a clock appointment

❌ La vespera filmo komenciĝas la okan.

Incorrect — the accusative ordinal looks like a calendar date, not a clock time.

✅ La vespera filmo komenciĝas je la oka.

The evening film starts at eight.

Importing English for as por

❌ Ni atendis por du horoj.

Incorrect — por does not mark elapsed duration here.

✅ Ni atendis du horojn.

We waited for two hours.

Doubling the negation in neniam

❌ Mi ne neniam malfruas.

Incorrect — neniam already supplies the clause's negative meaning.

✅ Mi neniam malfruas.

I am never late.

Translating a half-hour formula literally

❌ Nun estas duono de la naŭa.

Incorrect in neutral Esperanto — this copies a national-language clock formula and is ambiguous.

✅ Nun estas la oka kaj duono.

It is half past eight now.

Key Takeaways

Use estas la + ordinal to tell the hour and je la + ordinal to schedule something. Express recurrence with forms such as ĉiun vendredon, ĉiusemajne, and dufoje tage. Keep a time point distinct from a duration: post tri tagoj locates a later point, while tri tagojn measures how long an event lasts. Finally, learn jam, ankoraŭ, and ne plu as a three-way boundary system rather than as one-to-one translations of English adverbs.

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