The word diēs (day) is one of the most essential time-related vocabulary items in Latin. It belongs to the 5th declension, a small but important group of nouns. Uniquely, diēs can be either masculine or feminine, though it is typically masculine when referring to a specific day and sometimes feminine when referring to an appointed day or date.
FAQ Schema: Question: What does diēs mean in Latin? Answer: Diēs means "day" in Latin. It is a 5th declension noun that can be either masculine or feminine, used to refer to a period of 24 hours, daylight hours, or a specific date.
In this lesson, diēs appears in various conversational contexts, showing how Romans discussed daily activities, made appointments, and referred to time. The examples progress from simple phrases to more complex conversational exchanges, incorporating previously learned vocabulary and grammatical constructions.
Educational Schema: Type: Language Learning Material Subject: Latin Language Level: Beginner to Intermediate Focus: Conversational Latin with 5th Declension Nouns Method: Construed Text with Progressive Complexity
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diēs is a 5th declension noun, one of only two commonly used 5th declension nouns (the other being rēs) -
It can be either masculine or feminine, with masculine being more common -
In conversational Latin, diēs frequently appears in discussions about scheduling, daily activities, and time expressions -
The genitive diēī and ablative diē are particularly common in time expressions
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54.1 Quandō when diēs day festus festive erit will-be?
54.2 Crās tomorrow diēs day optimā best erit will-be ad for iter journey faciendum making.
54.3 Hodiernus today's diēs day mihi to-me nōn not placet pleases.
54.4 Quota which diē on-day mēnsis of-month tē you vidēbō I-will-see?
54.5 Omnēs all diēs days aestātis of-summer calidī hot sunt are.
54.6 Prīmā first lūce at-light diēī of-day surgere to-rise dēbēmus we-must.
54.7 Diēs day nātālis of-birth meus my prope near est is.
54.8 Quot how-many diēs days in in hebdomadā week sunt are?
54.9 Tertius third diēs day pluvius rainy fuit was sed but hodiē today sōl sun lūcet shines.
54.10 Diē on-day Martis of-Mars ad to forum forum ībimus we-will-go.
54.11 Longissimus longest diēs day annī of-year aestāte in-summer venit comes.
54.12 Post after trēs three diēs days domum home revertēmur we-will-return.
54.13 Diēs days festī festive mihi to-me maximē greatly placent please.
54.14 Mediō in-middle diē of-day prandium lunch sūmimus we-take.
54.15 Alterō on-next diē day tē you certē certainly vīsitābō I-will-visit.
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54.1 Quandō diēs festus erit? When will the holiday be?
54.2 Crās diēs optimā erit ad iter faciendum. Tomorrow will be the best day for making a journey.
54.3 Hodiernus diēs mihi nōn placet. I don't like today.
54.4 Quotā diē mēnsis tē vidēbō? On what day of the month will I see you?
54.5 Omnēs diēs aestātis calidī sunt. All the days of summer are hot.
54.6 Prīmā lūce diēī surgere dēbēmus. We must rise at first light of day.
54.7 Diēs nātālis meus prope est. My birthday is near.
54.8 Quot diēs in hebdomadā sunt? How many days are in a week?
54.9 Tertius diēs pluvius fuit sed hodiē sōl lūcet. The third day was rainy but today the sun shines.
54.10 Diē Martis ad forum ībimus. On Tuesday we'll go to the forum.
54.11 Longissimus diēs annī aestāte venit. The longest day of the year comes in summer.
54.12 Post trēs diēs domum revertēmur. After three days we'll return home.
54.13 Diēs festī mihi maximē placent. I really enjoy holidays.
54.14 Mediō diē prandium sūmimus. We have lunch at midday.
54.15 Alterō diē tē certē vīsitābō. I'll certainly visit you the next day.
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54.1 Quandō diēs festus erit?
54.2 Crās diēs optimā erit ad iter faciendum.
54.3 Hodiernus diēs mihi nōn placet.
54.4 Quotā diē mēnsis tē vidēbō?
54.5 Omnēs diēs aestātis calidī sunt.
54.6 Prīmā lūce diēī surgere dēbēmus.
54.7 Diēs nātālis meus prope est.
54.8 Quot diēs in hebdomadā sunt?
54.9 Tertius diēs pluvius fuit sed hodiē sōl lūcet.
54.10 Diē Martis ad forum ībimus.
54.11 Longissimus diēs annī aestāte venit.
54.12 Post trēs diēs domum revertēmur.
54.13 Diēs festī mihi maximē placent.
54.14 Mediō diē prandium sūmimus.
54.15 Alterō diē tē certē vīsitābō.
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Diēs belongs to the 5th declension, characterized by the genitive ending -ēī and nominative ending -ēs. This declension contains very few nouns, with diēs (day) and rēs (thing) being the most common.
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Nominative: diēs (day) -
Genitive: diēī (of day) -
Dative: diēī (to/for day) -
Accusative: diem (day) -
Ablative: diē (by/with/from day)
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Nominative: diēs (days) -
Genitive: diērum (of days) -
Dative: diēbus (to/for days) -
Accusative: diēs (days) -
Ablative: diēbus (by/with/from days)
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Gender confusion: Students often assume all 5th declension nouns are feminine because rēs is feminine. Remember that diēs is usually masculine. -
Ablative form: The ablative diē is often confused with the dative diēī. The ablative lacks the final -ī. -
Accusative plural: Students expect diēs (nom. pl.) to change in the accusative plural, but it remains diēs.
Unlike English, which uses prepositions extensively for time expressions ("on Tuesday," "in three days"), Latin often uses cases alone: -
diē Martis = on Tuesday (ablative of time when) -
post trēs diēs = after three days (accusative of duration)
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Time when (answering "when?"): Use ablative without a preposition -
Example: diē Martis (on Tuesday) -
Duration (answering "for how long?"): Use accusative -
Example: trēs diēs (for three days) -
Time within which: Use ablative with or without in -
Example: paucīs diēbus (within a few days)
diēs, diēī m. (sometimes f.) - 5th declension -
Follows the -ēs, -ēī pattern -
Ablative singular diē (not diēī) -
Often used in time expressions without prepositions -
Compounds: hodiē (today), cotīdiē (daily), merīdiēs (midday)
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For Romans, diēs was more than just a unit of time—it structured their entire social, religious, and business life. The Roman day began at sunrise and was divided into twelve hours of daylight and twelve of darkness, regardless of season. This meant summer hours were longer than winter hours.
Romans named their days after the seven celestial bodies: diēs Sōlis (Sunday), diēs Lūnae (Monday), diēs Martis (Tuesday), diēs Mercuriī (Wednesday), diēs Iovis (Thursday), diēs Veneris (Friday), and diēs Sāturnī (Saturday). These names influenced many modern European languages.
The concept of diēs fastī (lawful days) and diēs nefastī (unlawful days) governed when legal business could be conducted. On diēs comītiālēs, popular assemblies could meet. Religious festivals created numerous diēs festī throughout the year.
In daily conversation, Romans frequently discussed the day's activities, made appointments, and planned around the religious and civic calendar. Time expressions using diēs appear throughout Latin literature, from casual letters to formal histories, showing how central this concept was to Roman life.
The phrase carpe diem (seize the day) from Horace encapsulates the Roman awareness of time's passage and the importance of making the most of each day—a sentiment that resonates across cultures and centuries.
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A: Salvē greetings amīce friend! Quālis what-kind-of diēs day hodiē today est is?
B: Salvē greetings et also tū you! Pulcherrimus most-beautiful diēs day est is. Sōl sun clārus bright lūcet shines et and caelum sky serēnum clear est is.
A: Vērum true dīcis you-say. Sed but herī yesterday diēs day pluvius rainy et and frīgidus cold fuit was. Putāsne do-you-think crās tomorrow similem similar diem day fore will-be?
B: Nesciō I-don't-know certē for-certain, sed but spērō I-hope diem day crāstinum tomorrow's aeque equally bonum good fore will-be. Quid what tū you hodiernō on-today's diē day agēs will-you-do?
A: Salvē amīce! Quālis diēs hodiē est? B: Salvē et tū! Pulcherrimus diēs est. Sōl clārus lūcet et caelum serēnum est. A: Vērum dīcis. Sed herī diēs pluvius et frīgidus fuit. Putāsne crās similem diem fore? B: Nesciō certē, sed spērō diem crāstinum aeque bonum fore. Quid tū hodiernō diē agēs?
A: Greetings, friend! What kind of day is today? B: Greetings to you too! It's a most beautiful day. The sun shines brightly and the sky is clear. A: You speak truly. But yesterday was a rainy and cold day. Do you think tomorrow will be similar? B: I don't know for certain, but I hope tomorrow will be equally good. What will you do today?
A: Salvē amīce! Quālis diēs hodiē est? B: Salvē et tū! Pulcherrimus diēs est. Sōl clārus lūcet et caelum serēnum est. A: Vērum dīcis. Sed herī diēs pluvius et frīgidus fuit. Putāsne crās similem diem fore? B: Nesciō certē, sed spērō diem crāstinum aeque bonum fore. Quid tū hodiernō diē agēs?
This dialogue demonstrates how diēs functions in natural conversation about weather and daily plans. Notice how diēs appears in different cases: -
diēs (nominative): subject of the sentence -
diem (accusative): direct object with putāsne and spērō -
diē (ablative): with hodiernō expressing "on today"
The dialogue uses orātiō oblīqua (indirect speech) in "Putāsne crās similem diem fore?" where fore (future infinitive of sum) creates an accusative + infinitive construction. This is how Romans naturally reported thoughts and opinions in conversation.
The adjectives pluvius (rainy) and frīgidus (cold) agree with diēs in gender, number, and case, showing that diēs is treated as masculine here. Time adverbs like hodiē (today), herī (yesterday), and crās (tomorrow) are actually fossilized forms related to diēs.
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G.1 A: Quid what proximīs next septem seven diēbus days faciēmus shall-we-do?
G.2 B: Prīmō on-first diē day ad to mercātum market ībimus we-will-go.
G.3 A: Bene well! Et and secundō on-second diē day?
G.4 B: Secundō on-second diē day amīcōs friends invītābimus we-will-invite ad to cēnam dinner.
G.5 A: Quot how-many diēs days opus work habēbis will-you-have?
G.6 B: Trēs three diēs days in in officiō office labōrābō I-will-work.
G.7 A: Quibus on-which diēbus days līber free eris will-you-be?
G.8 B: Diē on-day Sōlis of-Sun et and diē on-day Sāturnī of-Saturn līber free erō I-will-be.
G.9 A: Possumne can-I tē you vīsitāre visit alterutrō on-either diē day?
G.10 B: Certē certainly! Diē on-day Sōlis of-Sun melius better erit it-will-be.
G.11 A: Quandō when proximum next diem day festum festive celebrābimus shall-we-celebrate?
G.12 B: Post after decem ten diēs days Kalendae Kalends erunt will-be.
G.13 A: Tot so-many diēs days exspectāre to-wait nōn not possum I-can!
G.14 B: Diēs days celeriter quickly praetereunt pass-by cum when occupātī busy sumus we-are.
G.15 A: Vērum true est it-is! Tempus time fugit flies!
G.1 A: Quid proximīs septem diēbus faciēmus? What shall we do in the next seven days?
G.2 B: Prīmō diē ad mercātum ībimus. On the first day we'll go to the market.
G.3 A: Bene! Et secundō diē? Good! And on the second day?
G.4 B: Secundō diē amīcōs invītābimus ad cēnam. On the second day we'll invite friends to dinner.
G.5 A: Quot diēs opus habēbis? How many days will you have work?
G.6 B: Trēs diēs in officiō labōrābō. I'll work three days in the office.
G.7 A: Quibus diēbus līber eris? On which days will you be free?
G.8 B: Diē Sōlis et diē Sāturnī līber erō. I'll be free on Sunday and Saturday.
G.9 A: Possumne tē vīsitāre alterutrō diē? Can I visit you on either day?
G.10 B: Certē! Diē Sōlis melius erit. Certainly! Sunday will be better.
G.11 A: Quandō proximum diem festum celebrābimus? When will we celebrate the next holiday?
G.12 B: Post decem diēs Kalendae erunt. The Kalends will be in ten days.
G.13 A: Tot diēs exspectāre nōn possum! I can't wait so many days!
G.14 B: Diēs celeriter praetereunt cum occupātī sumus. Days pass quickly when we're busy.
G.15 A: Vērum est! Tempus fugit! That's true! Time flies!
G.1 A: Quid proximīs septem diēbus faciēmus?
G.2 B: Prīmō diē ad mercātum ībimus.
G.3 A: Bene! Et secundō diē?
G.4 B: Secundō diē amīcōs invītābimus ad cēnam.
G.5 A: Quot diēs opus habēbis?
G.6 B: Trēs diēs in officiō labōrābō.
G.7 A: Quibus diēbus līber eris?
G.8 B: Diē Sōlis et diē Sāturnī līber erō.
G.9 A: Possumne tē vīsitāre alterutrō diē?
G.10 B: Certē! Diē Sōlis melius erit.
G.11 A: Quandō proximum diem festum celebrābimus?
G.12 B: Post decem diēs Kalendae erunt.
G.13 A: Tot diēs exspectāre nōn possum!
G.14 B: Diēs celeriter praetereunt cum occupātī sumus.
G.15 A: Vērum est! Tempus fugit!
This dialogue showcases diēs in various time expressions common in conversational Latin:
Ordinal Numbers with diēs: Romans often used ordinal numbers (prīmus, secundus) with the ablative of diēs to indicate "on the first/second day." This construction doesn't require a preposition.
Accusative of Duration: Examples like trēs diēs and decem diēs show the accusative expressing duration of time without a preposition.
Ablative of Time When: Diē Sōlis and diē Sāturnī demonstrate the ablative case expressing specific time without in.
Interrogative Expressions: -
Quot diēs (how many days) - accusative of duration -
Quibus diēbus (on which days) - ablative of time when
Compound Time Expression: Proximīs septem diēbus combines an adjective (proximus) with a number (septem) modifying diēs in the ablative plural.
The dialogue also includes the idiomatic expression tempus fugit (time flies), showing how time-related vocabulary creates memorable phrases in Latin that have entered modern languages.
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The Latinum Institute has been creating innovative online language learning materials since 2006, pioneering methods for autodidactic Latin study. These conversational Latin lessons use the construed text method, presenting Latin in a way that makes grammatical relationships immediately clear to English speakers.
Each lesson in this series focuses on high-frequency Latin vocabulary, presenting it in natural conversational contexts. The interleaved glossing in Part A allows beginners to understand every element of each sentence, while Parts B and C progressively remove scaffolding to build reading fluency. The grammar explanations in Part D are specifically designed for English speakers, highlighting contrasts between the languages and common pitfalls. G.1 A: Quid what proximīs next septem seven diēbus days faciēmus shall-we-do?
G.2 B: Prīmō on-first diē day ad to mercātum market ībimus we-will-go.
G.3 A: Bene well! Et and secundō on-second diē day?
G.4 B: Secundō on-second diē day amīcōs friends invītābimus we-will-invite ad to cēnam dinner.
G.5 A: Quot how-many diēs days opus work habēbis will-you-have?
G.6 B: Trēs three diēs days in in officiō office labōrābō I-will-work.
G.7 A: Quibus on-which diēbus days līber free eris will-you-be?
G.8 B: Diē on-day Sōlis of-Sun et and diē on-day Sāturnī of-Saturn līber free erō I-will-be.
G.9 A: Possumne can-I tē you vīsitāre visit alterutrō on-either diē day?
G.10 B: Certē certainly! Diē on-day Sōlis of-Sun melius better erit it-will-be.
G.11 A: Quandō when proximum next diem day festum festive celebrābimus shall-we-celebrate?
G.12 B: Post after decem ten diēs days Kalendae Kalends erunt will-be.
G.13 A: Tot so-many diēs days exspectāre to-wait nōn not possum I-can!
G.14 B: Diēs days celeriter quickly praetereunt pass-by cum when occupātī busy sumus we-are.
G.15 A: Vērum true est it-is! Tempus time fugit flies!