on certain days

USAGE SUMMARY

The phrase "on certain days" is correct and usable in written English.
It can be used to indicate that something occurs or is applicable only on specific days, rather than every day. Example: "The library is open late on certain days of the week, so be sure to check the schedule."

✓ Grammatically correct

News & Media

Encyclopedias

Science

Wiki

Human-verified examples from authoritative sources

Exact Expressions

59 human-written examples

"On certain days it can be pretty rough".

The New York Times

Perhaps not always but on certain days, yes.

The New York Times - Arts

And on certain days the can of paraffin was empty.

The New Yorker

Nobody, it seems, except Mark Morris, on certain days.

The New Yorker

We are stressed, we struggle financially, we're not great at masking our feelings on certain days.

The New York Times

Visitors are allowed on certain days and hours, though usually not in the former research laboratories.

The New York Times - Travel

Hendrick Motorsports even lets fans view pit practice on certain days, usually middle of the week.

The New York Times

But you can get on these courses on certain days and times.

The New York Times - Travel

Some people prepare and enjoy special foods on certain days during the celebrations.

Encyclopedia Britannica

It contained details of workouts, statistics from competitions, even what he ate on certain days.

The New York Times - Magazine

Snowdon Sherpa S2 open-top bus between Betws-y-Coed and Llandudno on certain days.

The Guardian - Travel

Expert writing Tips

Best practice

When specifying the days, follow "on certain days" with a clarifying phrase or clause. For example, "The museum is free on certain days, such as the first Friday of each month."

Common error

Avoid using "on certain days" without providing context or examples, as it can leave the reader unclear about which days are being referred to. Always provide specific details or examples to clarify which days are meant.

Linguistic Context

The phrase "on certain days" functions as an adverbial phrase, modifying a verb by specifying when an action occurs or a condition applies. It indicates a temporal limitation, meaning the action is restricted to specific, though perhaps not explicitly named, days. As shown by Ludwig, the expression is frequently present in various sentences.

Expression frequency: Very common

Frequent in

News & Media

37%

Wiki

17%

Science

15%

Less common in

Encyclopedias

5%

Formal & Business

0%

Reference

0%

Ludwig's WRAP-UP

The phrase "on certain days" is a grammatically correct and very common adverbial phrase used to specify that an action or condition is limited to particular days. Ludwig AI confirms its correct usage. It is frequently found in News & Media, Wiki and Science contexts. When using "on certain days", it's essential to provide enough context to clarify which days are being referenced to avoid vagueness. Alternatives such as "on particular days" or "on specific days" can be used for similar effect, with slight variations in formality.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

on particular days

Replaces "certain" with "particular", offering a slightly more formal tone while maintaining the same meaning.

on specific days

Substitutes "certain" with "specific", emphasizing the distinct nature of the days in question.

on select days

Emphasizes that the days are chosen or preferred for the activity.

during some days

Uses "during" to indicate that the activity happens within the timeframe of those days, rather than just on them.

on designated days

Highlights that the days are officially appointed for the activity.

certain weekdays

Specifies that the "certain days" are weekdays, limiting the scope.

some days of the week

More explicitly refers to days within a week, adding a temporal context.

on a few days

Highlights that the activity happens only on a small number of days.

at times

A more general phrase that indicates the activity happens occasionally, but less specific about which days.

on occasion

Similar to "at times", but implies a more formal or infrequent occurrence.

FAQs

How can I use "on certain days" in a sentence?

You can use "on certain days" to indicate that something happens or is available only on some days and not others. For example, "The park offers guided tours "on certain days" of the week."

What's a more formal alternative to "on certain days"?

A more formal alternative would be "on specified days" or "on designated days", which sound more official and precise.

Is it better to say "on certain days" or "on some days"?

The choice depends on the context. "On some days" is more general, while ""on certain days"" implies a more specific, though perhaps unspecified, set of days.

What does "on certain days" imply about the other days?

Using ""on certain days"" implies that the described action or condition does not occur on the other days. For instance, "The exhibit is open "on certain days"" suggests it is closed the rest of the time.