Used and loved by millions

Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak quote

Justyna Jupowicz-Kozak

CEO of Professional Science Editing for Scientists @ prosciediting.com

MitStanfordHarvardAustralian Nationa UniversityNanyangOxford

it varies day by day

Grammar usage guide and real-world examples

USAGE SUMMARY

The phrase "it varies day by day" is correct and usable in written English.
You can use it to describe something that changes frequently or inconsistently over time, typically on a daily basis. Example: "The weather in this region is unpredictable; it varies day by day, making it hard to plan outdoor activities."

✓ Grammatically correct

News & Media

Science

Human-verified similar examples from authoritative sources

Similar Expressions

60 human-written examples

Figure  2 shows how mortality risk varies day-by-day over the first year on ART.

It has long been observed that the cytotoxicity of a single batch of CIK cells in continuous culture varies day by day [ 9].

And the quality varies day by day, block by block.

News & Media

The New York Times

Before beginning any workout, it's good to assess your current level of flexibility -- which can vary day by day.

News & Media

Huffington Post

Several readers are confused about hand-baggage rules that seem to vary day by day and from country to country.

Rather than the whole workforce walking out, the exact workforce on strike varied day by day.

News & Media

Vice

I've learned that the inputs and outcomes of this large-scale social experiment vary day by day.

News & Media

Huffington Post

Observation time for consecutive UVI imaging is typically over half a day, but it varies significantly day by day.

Notice how it varies from day to day.

News & Media

HuffPost

What is your definition of God? JEAN: It varies from day to day.

News & Media

Huffington Post

"It varies from day to day so you just rolled with the punches and did the job".

News & Media

Los Angeles Times
Show more...

Expert writing Tips

Best practice

When describing trends or conditions that are not stable, use "it varies day by day" to convey unpredictability or inconsistency. For example, "The demand for our product it varies day by day, so we adjust our production schedule accordingly."

Common error

Avoid using "it varies day by day" when describing long-term trends or seasonal changes. This phrase is best suited for short-term, daily fluctuations, not for changes that occur over weeks or months.

Antonio Rotolo, PhD - Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Antonio Rotolo, PhD

Digital Humanist | Computational Linguist | CEO @Ludwig.guru

Source & Trust

81%

Authority and reliability

4.1/5

Expert rating

Real-world application tested

Linguistic Context

The phrase "it varies day by day" functions as an adverbial phrase. Ludwig AI indicates it's used to modify a verb or clause, indicating the frequency or manner in which something changes. It specifies that the variation occurs on a daily basis.

Expression frequency: Common

Frequent in

News & Media

52%

Science

42%

Academia

6%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

In summary, the phrase "it varies day by day" is a grammatically sound and commonly used expression to indicate daily fluctuations or inconsistencies. According to Ludwig AI, it is correct and usable in written English. It functions as an adverbial phrase, adding detail to verbs or clauses by describing the nature of daily changes. While alternatives like "it changes daily" or "it fluctuates from day to day" exist, "it varies day by day" provides a specific emphasis on the daily variation. It's essential to use this phrase when describing short-term, daily fluctuations rather than long-term trends.

FAQs

How can I use "it varies day by day" in a sentence?

Use "it varies day by day" to describe something that changes frequently or inconsistently on a daily basis. For example, "The quality of the ingredients it varies day by day, so the taste of the dish can be different each time".

What are some alternatives to "it varies day by day"?

You can use alternatives like "it changes daily", "it fluctuates from day to day", or "it differs each day" depending on the context.

Is it correct to say "it varies from day to day" instead of "it varies day by day"?

Yes, both "it varies from day to day" and "it varies day by day" are correct and convey a similar meaning. The choice between them often comes down to personal preference or stylistic considerations.

What's the difference between "it varies day by day" and "it varies by the day"?

"It varies day by day" emphasizes a continuous change happening each day, while "it varies by the day" suggests that the variation is dependent on or influenced by the specific day. For example, "The amount of sunlight it varies by the day based on weather conditions".

ChatGPT power + Grammarly precisionChatGPT power + Grammarly precision
ChatGPT + Grammarly

Editing plus AI, all in one place.

Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.

Source & Trust

81%

Authority and reliability

4.1/5

Expert rating

Real-world application tested

Most frequent sentences: