Micro-listening
Monday or Mondays: Choose the Right Form
When should I use Monday, Mondays or Monday's?
Use 'Monday' for one specific date, 'Mondays' for repeated weekly occurrences, and 'Monday's' before a noun linked to one particular day. For example, 'The interview is on Monday.' Write 'every Monday', not 'every Mondays'. In 'Monday's timetable', the apostrophe shows that the timetable relates to that day.
Key points
- Use singular 'Monday' for one scheduled date.
- Use plural 'Mondays' for regular weekly activities.
- Use 'Monday's' directly before a related noun.
- After 'every', always write singular 'Monday'.
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At a glance
| Form | Use it for | Example |
|---|---|---|
| Monday | One specific calendar day | The interview is on Monday. |
| Mondays | Repeated weekly events | The café closes early on Mondays. |
| Monday's | Before a noun linked to one day | Monday's timetable has changed. |
| every Monday | A recurring event with 'every' | We meet every Monday. |
| Monday mornings | Repeated events at that time | Classes begin on Monday mornings. |
The full explanation
Monday is a singular proper noun identifying one calendar day. Mondays is the plural form, used for repeated weekly occurrences or all Mondays generally. Monday's is a singular possessive form, placed before another noun to show that an item, task, or event is associated with that day.
The technician will service the elevator on Monday.
Why it works: The singular day indicates a single planned visit on an upcoming calendar date.
2 more examples
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Our medical clinic offers walk-in screenings on Mondays.
The plural form signals a routine weekly service rather than a one-time visit.
-
Monday's training session starts thirty minutes earlier than usual.
The possessive form modifies training session to show which day holds the session.
Read the full guide
Try the listening exercise
Identify a Single Scheduled Day
When an action happens once on a specific calendar date, use the singular form Monday. English speakers commonly pair this form with prepositions such as on, or with determiners like this, next, or last. For example, a supervisor might mention that a client arrives on Monday. The listener understands that this event belongs to one specific day rather than a repeating habit. Capitalize the word in all contexts because names of weekdays are proper nouns.
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The courier will deliver the package on Monday afternoon.
Why it works: Singular Monday specifies one planned delivery date.
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Next Monday is a public holiday for the banking industry.
Why it works: The singular day names one calendar entry on the upcoming schedule.
Your turn
Select the sentence that refers to a single upcoming event.
Answer: We inspect the fire alarms on Monday.
Show the answer
Answer: We inspect the fire alarms on Monday.
The singular noun without an apostrophe identifies one specific day on the calendar.
Describe Recurring Weekly Events
When an event occurs repeatedly every week, add an s to make the noun plural. You can say on Mondays or simply place Mondays at the start of a clause as the subject. In workplaces, this plural form helps teams communicate operating hours, weekly staff syncs, and regular cleaning duties. Unlike single appointments, these actions return week after week without requiring a new calendar invitation each time.
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The library remains closed on Mondays for inventory updates.
Why it works: Plural Mondays shows this closing occurs every week.
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Mondays require extra preparation because customer orders accumulate over the weekend.
Why it works: Mondays acts as the plural subject for repeated weekly experiences.
You can practise this again in Reflexive Pronouns: Choose the Right Form and Possessive Determiners: Choose the Right Form.
Your turn
Which option best describes a store open every week at the same time?
Answer: The store offers senior discounts on Mondays.
Show the answer
Answer: The store offers senior discounts on Mondays.
The plural form Mondays communicates that the discount is a recurring weekly policy.
Attach Items to Monday Using an Apostrophe
Use the apostrophe form Monday's when the day modifies a following noun to show possession, association, or origin. This structure functions like other singular possessive nouns in English. Instead of saying the meeting scheduled for Monday, you can say Monday's meeting. The apostrophe does not indicate more than one day. It signals that the following noun belongs to or happens during that specific Monday.
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Please review Monday's agenda before entering the conference room.
Why it works: Monday's links the agenda to that day's scheduled discussions.
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Monday's weather forecast predicts heavy rain along the coastal highway.
Why it works: The possessive form indicates the forecast published for or concerning Monday.
Your turn
Choose the correct sentence to describe a workshop taking place on that day.
Answer: Monday's workshop starts at eight.
Show the answer
Answer: Monday's workshop starts at eight.
The possessive form Monday's connects the day directly to the following noun workshop.
Keep the Singular Form After Every
Learners often feel tempted to make the weekday plural after words like every or each because the meaning describes multiple events over time. However, every and each grammatically require a singular countable noun. Writing every Mondays is an error in standard English. The determiner every already expresses recurrence, so the noun must stay in its base singular form without an s or an apostrophe.
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Every Monday, the accounting department reconciles the register receipts.
Why it works: Every requires the singular form Monday despite the recurring action.
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Each Monday brings a new list of maintenance requests from the tenants.
Why it works: Each pairs with the singular noun Monday to describe individual weekly cycles.
Your turn
Which phrase correctly completes the sentence: 'The team submits timecards ___'?
Answer: every Monday
Show the answer
Answer: every Monday
The determiner every must be followed by a singular countable noun.
Separate One Morning from Repeated Mornings
When you combine the weekday with times of day such as morning, afternoon, or evening, the position of the plural s changes the meaning. Saying on Monday morning points to a single date on the calendar. Saying on Monday mornings means every Monday when that time comes around. In both cases, Monday itself remains singular because morning takes the plural ending to show weekly recurrence.
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We have an orientation session on Monday morning at nine.
Why it works: Singular morning limits the session to one specific upcoming date.
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Traffic on the bridge is notoriously heavy on Monday mornings.
Why it works: Plural mornings shows that this heavy traffic occurs every week.
Your turn
How do you state that an all-hands meeting happens every week before noon?
Answer: The all-hands meeting takes place on Monday mornings.
Show the answer
Answer: The all-hands meeting takes place on Monday mornings.
To show a weekly routine with a time of day, keep Monday singular and add the plural s to morning.
Recognize Identical Pronunciation in Speech
In spoken English, both Mondays and Monday's sound identical. Both words conclude with the voiced sound /z/. Because your ear cannot hear the apostrophe, you must rely entirely on grammatical structure to determine how to transcribe what you hear. If the word appears before another noun with a possessive relationship, write Monday's. If the word follows a preposition or acts as a plural subject, write Mondays.
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Mondays can feel overwhelming if you leave tasks unfinished on Friday.
Why it works: Spoken with a final /z/ sound and written without an apostrophe because it is a plural subject.
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Monday's announcement clarified the updated holiday pay policy.
Why it works: Spoken with the same final /z/ sound but written with an apostrophe because it modifies announcement.
Your turn
When listening to a speaker say /ˈmʌndeɪz/, how can you tell an apostrophe is needed in writing?
Answer: The word modifies a following noun such as schedule or results.
Show the answer
Answer: The word modifies a following noun such as schedule or results.
Context and grammar identify possessive usage because the pronunciation of Mondays and Monday's is identical.
Avoid Adding Apostrophes to Plural Schedules
A common writing mistake is adding an apostrophe before the s in routine schedules. Writers often assume that proper nouns ending in s require punctuation. This assumption produces incorrect sentences such as the office is closed on Monday's. An apostrophe never creates a standard plural noun. Unless the word directly introduces an item that belongs to or connects with that day, leave out the apostrophe entirely.
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The fitness center runs spin classes on Mondays.
Why it works: Correct plural spelling with no apostrophe for regular weekly classes.
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The cafeteria menu changes on Mondays.
Why it works: Mondays denotes the repeated weekly changeover with no possessive link.
Your turn
Which sentence avoids the common punctuation mistake?
Answer: Our team holds status reviews on Mondays.
Show the answer
Answer: Our team holds status reviews on Mondays.
Plural days of the week describing a routine do not use an apostrophe.
Use a Quick Test Before Writing
Before sending an email or submitting a form, apply a two-step mental check. First, ask if the action happens on one calendar date or repeats every week. If it repeats, write Mondays. Second, if you chose the /z/ ending, check whether a noun immediately follows. If a noun follows and belongs to the day, write Monday's. If no related noun follows, write Mondays without punctuation.
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We need to finalize Monday's roster before Friday afternoon.
Why it works: Roster follows immediately, confirming that Monday's is the correct possessive form.
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The pharmacy is open late on Mondays.
Why it works: No noun follows, and the context is a recurring schedule, confirming plural Mondays.
Your turn
You want to say that test scores come out every week on that day. Which sentence is correct?
Answer: Exam results are posted on Mondays.
Show the answer
Answer: Exam results are posted on Mondays.
The sentence describes a regular weekly outcome with no following noun, requiring the plural form Mondays.
Common mistakes
What learners often say, what to say instead, and why.
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Not this:
The office opens late on Monday's.Say: The office opens late on Mondays.
Apostrophes do not form regular plurals.
-
Not this:
We send the report every Mondays.Say: We send the report every Monday.
'Every' takes a singular countable noun.
-
Not this:
Mondays appointment starts at ten.Say: Monday's appointment starts at ten.
The apostrophe links the appointment to one particular Monday.
-
Not this:
The course runs on Mondays morning.Say: The course runs on Monday mornings.
For repeated weekly times, 'Monday' stays singular and 'mornings' becomes plural.
Before you go
Remember this
Check your sentence structure before writing the day. Use singular Monday for one date, plural Mondays with an s for recurring weekly routines, and the apostrophe form Monday's before a noun linked to that day.
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The doctor will see you on Monday at nine.
Use the singular noun Monday because the speaker refers to one specific appointment date.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The final t or d is barely said before the next consonant.
- A small word like this is said quickly and softly, not as written.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The final t or d is barely said before the next consonant.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The final t or d is barely said before the next consonant.
Listening 2 of 4
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Our swimming pool opens early on Mondays.
The plural form Mondays shows that early opening occurs every week.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
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Listening 3 of 4
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Please print Monday's agenda before our morning meeting begins. The leadership group will announce the new training schedule and answer questions from staff members.
Use Monday's with an apostrophe because the agenda belongs to that specific day's meeting.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
This clip is longer. Follow the instruction above the answer field.
Listening 4 of 4
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We expect a heavy cargo shipment on Monday around noon. The receiving dock remains closed on Mondays during regular morning maintenance, so the driver must park outside bay four. Please verify Monday's manifest in the shipping database before the truck pulls up. Our warehouse crew will unload every pallet quickly so that normal operations resume by two.
The message contrasts a specific shipment on Monday, recurring maintenance on Mondays, and Monday's cargo manifest.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
Listen for
At natural speed these words change shape. Tap one to hear it again.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
- The last sound of the first word runs straight into the next word.
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Say it your way
Describe your personal weekly schedule to a study partner. Explain at least one activity you do on Mondays and mention one specific task planned for next Monday.
Use: monday or Mondays: Choose the Right Form
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The doctor will see you on Monday at nine.
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Questions about "Monday or Mondays: Choose the Right Form"
Should I always capitalize Monday, even when it is plural?
Yes, always capitalize the day name regardless of the form. In English, days of the week are proper nouns derived from specific names. Whether you write Monday, Mondays, or Monday's, the first letter must remain a capital M in every sentence position.
Our gym runs free spin classes on Mondays.
Monday's session will focus on cardiovascular endurance.
Is there any difference between on Mondays and every Monday?
Both expressions describe repeated weekly actions and are often interchangeable. However, on Mondays sounds slightly more neutral and common for official schedules. Saying every Monday emphasizes that there are no exceptions to the routine. Remember that every requires the singular form Monday.
The museum offers free admission on Mondays.
Every Monday, the curator inspects the main gallery exhibits.
Can Mondays be the subject of a sentence without the word on?
Yes, Mondays can act directly as the subject of a clause. When used this way, it refers to the day in general or describes your regular weekly experience. Because the noun is plural, make sure to pair it with a plural verb such as are or feel.
Mondays are usually busy at our call center.
Mondays feel shorter when our morning meetings run efficiently.
Is there ever a time to write Mondays' with the apostrophe after the s?
Mondays' with the apostrophe after the s is grammatically possible when something belongs to multiple Mondays, such as comparing several Mondays' sales figures. However, native speakers rarely use this form because it sounds awkward. Most writers rephrase the thought using of, such as the sales figures of past Mondays.
The analyst compared the sales figures of three consecutive Mondays.
We reviewed the attendance records from recent Mondays.
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