English often inserts a word where Greek does not: on Sunday, in the morning, for two days, in August, three times a week. Greek commonly uses a time expression in the bare accusative — a noun phrase with no preposition in front — to locate an event in time or measure its duration. Once you see this, a whole layer of clumsy translation-Greek disappears from your speech.
The technical name for this is the adverbial accusative: a noun phrase in the accusative that is not the object of anything, but is functioning as an adverb. It is the same machinery behind the accusative of measure — περπάτησα πέντε χιλιόμετρα — and understanding them as one phenomenon is far more useful than learning two lists.
Points in time: when did it happen?
In the neutral full calendar pattern, days, parts of the day, months, seasons, holidays and years take a bare accusative, normally with the definite article.
| Greek | English | What English adds |
|---|---|---|
| την Κυριακή | on Sunday | on |
| τη Δευτέρα το πρωί | on Monday morning | on / in |
| το πρωί / το μεσημέρι / το βράδυ | in the morning / at midday / in the evening | in / at |
| τον Αύγουστο | in August | in |
| το καλοκαίρι / τον χειμώνα | in summer / in winter | in |
| τα Χριστούγεννα / το Πάσχα | at Christmas / at Easter | at |
| αυτή την εβδομάδα | this week | — |
| την άλλη Δευτέρα | next Monday | — |
| εκείνο το βράδυ | that evening | — |
| το 1999 | in 1999 | in |
Την Κυριακή θα φάμε όλοι μαζί στη γιαγιά.
tin Kiriakí tha fáme óli mazí sti yayá
On Sunday we'll all eat together at my grandmother's.
Το πρωί δεν μιλάω σε κανέναν πριν από τον καφέ μου.
to proí dhen miláo se kanénan prin apó ton kafé mu
In the morning I don't talk to anyone before my coffee.
Τον Αύγουστο κλείνουν τα πάντα και η Αθήνα αδειάζει.
ton Ávghusto klínun ta pánda ke i Athína adhiázi
In August everything shuts and Athens empties out.
In a neutral full calendar expression, keep the article: την Κυριακή, τον Αύγουστο, το καλοκαίρι. Bare day names do occur as calendar labels, headlines and compressed informal speech, but they are not the safest learner model for an ordinary sentence. Κάθε ("every") replaces the article: κάθε μέρα, κάθε Κυριακή, κάθε καλοκαίρι.
Κάθε Δευτέρα λέω ότι θα ξεκινήσω γυμναστήριο.
káthe Dheftéra léo óti tha ksekiníso yimnastírio
Every Monday I say I'm going to start going to the gym.
Τα βράδια βλέπω σειρές μέχρι πολύ αργά.
ta vrádhia vlépo sirés méchri polí arghá
In the evenings I watch series until really late.
Duration: how long did it last?
A stretch of time also stands in the bare accusative — and here the missing English word is for.
Έμεινα δύο μέρες στη Θεσσαλονίκη και γύρισα.
émina dhío méres sti Thesaloníki ke yírisa
I stayed in Thessaloniki for two days and came back.
Περιμέναμε δύο ώρες στην ουρά για ένα χαρτί.
periméname dhío óres stin urá ya éna chartí
We waited in the queue for two hours for one document.
Έβρεχε όλη τη νύχτα και το πρωί είχε πλημμυρίσει ο δρόμος.
évreche óli ti níchta ke to proí íche plimirísi o dhrómos
It rained all night and by morning the street had flooded.
Note όλη τη νύχτα, όλη μέρα, όλο τον χρόνο — "all night / all day / all year". The quantifier όλος agrees with the noun and the whole phrase sits in the accusative. Watch the article in the last one: χρόνος is masculine, so neutral current writing uses τον χρόνο throughout. Relaxed pronunciation can reduce the final sound, and older or informal spelling may reflect that reduction as το χρόνο; this guide consistently teaches the current written form τον.
Δουλεύει όλο τον χρόνο και παίρνει άδεια μόνο τον Αύγουστο.
dhulévi ólo ton chróno ke pérni ádhia móno ton Ávghusto
He works all year round and only takes leave in August.
Περίμενα όλη μέρα ένα τηλέφωνο που δεν ήρθε ποτέ.
perímena óli méra éna tiléfono pu dhen írthe poté
I waited all day for a call that never came.
Frequency: "three times a week"
English uses an indefinite article for the distributive "per": twice *a week. Greek uses the *definite article in the accusative — literally "twice the week". This one is unintuitive and worth drilling.
| Greek | English |
|---|---|
| τρεις φορές την εβδομάδα | three times a week |
| δύο φορές την ημέρα | twice a day |
| μία φορά τον μήνα | once a month |
| εκατό ευρώ την ώρα | a hundred euros an hour |
Πάω γυμναστήριο τρεις φορές την εβδομάδα, όταν προλαβαίνω.
páo yimnastírio tris forés tin evdhomádha, ótan prolavéno
I go to the gym three times a week, when I have time.
Το φάρμακο το παίρνεις δύο φορές την ημέρα, μετά το φαγητό.
to fármako to pérnis dhío forés tin iméra, metá to fayitó
You take the medicine twice a day, after meals.
When a preposition is needed
The bare accusative is the default, not a universal. These four prepositional patterns add a temporal relation or viewpoint that the bare form does not mark by itself.
σε + time = "in X's time" (from now). This is a future interval before something happens, not a duration.
Σε δέκα λεπτά είμαι εκεί, μη φύγεις.
se dhéka leptá íme ekí, mi fíyis
I'll be there in ten minutes — don't leave.
για + duration = an explicitly bounded or allocated interval. The bare accusative is the neutral measure and works in past or future contexts. Για foregrounds the interval as a limited stretch, so it is especially natural for a plan or temporary arrangement, but it can also describe a completed stay. Compare Έμεινα δύο μέρες with Θα μείνω για δύο μέρες: tense supplies the actual-versus-planned contrast; για makes the proposed limit more prominent.
Θα λείψω για μια βδομάδα, θα σου αφήσω τα κλειδιά.
tha lípso ya mia vdhomádha, tha su afíso ta klidhiá
I'll be away for a week — I'll leave you the keys.
από … μέχρι / ως = a bounded span with endpoints.
Το μαγαζί είναι ανοιχτό από τις εννιά μέχρι τις εννιά.
to maghazí íne anichtó apó tis eniá méchri tis eniá
The shop is open from nine to nine.
μέσα σε = "within".
Μέσα σε έναν χρόνο άλλαξε τελείως.
mésa se énan chróno álakse telíos
Within a year he changed completely.
Clock time is the odd one out: σε + accusative
Telling the time breaks the bare-accusative pattern, because the hour takes σε, contracted with the feminine plural article: στις.
Το ραντεβού είναι στις τρεις, μην αργήσεις πάλι.
to randevú íne stis tris, min aryísis páli
The appointment is at three — don't be late again.
Ξυπνάω στις έξι και μισή κάθε μέρα, ακόμα και το Σάββατο.
ksipnáo stis éksi ke misí káthe méra, akóma ke to Sávato
I wake up at half past six every day, even on Saturdays.
So: στις πέντε (at five o'clock) but την Παρασκευή (on Friday) and το πρωί (in the morning) — and all three can stack in one phrase: την Παρασκευή το πρωί στις εννιά. Full detail on Telling the time.
Common Mistakes
1. Adding σε before a day or a part of the day. English "on Sunday" tempts an unnecessary preposition.
❌ Σε την Κυριακή πάμε εκδρομή.
Incorrect — a day of the week takes the bare accusative.
✅ Την Κυριακή πάμε εκδρομή.
tin Kiriakí páme ekdhromí
On Sunday we're going on a day trip.
2. Leaving the day in the nominative. Since English marks nothing, learners leave the dictionary form standing.
❌ Η Κυριακή πάμε στη θάλασσα.
Incorrect in the intended neutral sentence — the adverbial day must be accusative: την Κυριακή.
✅ Την Κυριακή πάμε στη θάλασσα.
tin Kiriakí páme sti thálasa
On Sunday we're going to the beach.
3. Translating distributive “per” mechanically with σε. The bare accusative gives a rate; a prepositional phrase instead locates the events within a particular week.
✅ Δουλεύω τρεις φορές την εβδομάδα.
dhulévo tris forés tin evdhomádha
I work three times a week. (A general rate.)
✅ Δούλεψα τρεις φορές μέσα στην εβδομάδα.
dhúlepsa tris forés mésa stin evdhomádha
I worked three times during the week. (Events located within a particular week.)
4. Reaching for για every time English says “for.” Both versions are grammatical. The bare accusative simply measures a stretch; για highlights it as bounded and often allocated, although context rather than the preposition alone tells you whether it was merely planned or actually completed.
✅ Διάβαζα τρεις ώρες χθες το βράδυ.
dhiávaza tris óres chthes to vrádhi
I studied for three hours last night. (A neutral measure.)
✅ Θα διαβάσω για τρεις ώρες και μετά τα παρατάω.
tha dhiaváso ya tris óres ke metá ta paratáo
I'm going to study for three hours and then I'm giving up. (A bounded interval in the plan.)
5. Confusing duration with “ago.” Both constructions are grammatical, but they answer different questions. “Ago” needs πριν, and careful Greek commonly uses πριν από.
✅ Έλειψε δύο μέρες.
élipse dhío méres
He was away for two days. (Duration.)
✅ Έφυγε πριν από δύο μέρες.
éfiye prin apó dhío méres
He left two days ago. (Bare πριν δύο μέρες is extremely common in speech; πριν από is the careful written form.)
Key Takeaways
- Bare accusative = the default time expression. Use no preposition in την Κυριακή, το πρωί, τον Μάιο, δύο μέρες. Calendar nouns normally keep the definite article; counted durations and κάθε phrases have their own determiner pattern.
- The same construction covers English on, in, at, for and the distributive per (τρεις φορές την εβδομάδα).
- Singular usually frames one occasion; plural makes a habit explicit: το βράδυ vs τα βράδια, την Κυριακή vs τις Κυριακές.
- κάθε replaces the article: κάθε μέρα, κάθε Δευτέρα.
- Prepositions add a viewpoint: σε = in X's time, για = an explicitly bounded or allocated interval, από…μέχρι = a span with endpoints, μέσα σε = within.
- Clock time is the exception: στις τρεις, στις έξι και μισή.
Related Topics
- Accusative for Extent and MeasureB1 — Distance, weight, price and height all stand in a bare accusative with no preposition — Περπάτησα πέντε χιλιόμετρα, Ζυγίζει δύο κιλά, Κόστισε δέκα ευρώ — plus the one measurement that escapes it (age takes the genitive: τριάντα χρονών) and the colloquial article-less destination accusative behind πάμε σπίτι and πάω δουλειά.
- Telling the TimeA1 — Ask and tell clock time in Greek with feminine hour forms, και for minutes past, παρά for minutes to, and στη μία versus στις δύο.
- Adverbs of TimeA1 — Place events on a Greek timeline with essential time adverbs, understand their aspect cues, and use ποτέ, ακόμα, and πια with the right polarity.