on a same day

USAGE SUMMARY

The phrase "on a same day" is correct and usable in written English.
You can use it when referring to something that happens on the same day as something else. For example, "We both found out the news on a same day."

✓ Grammatically correct

Science

News & Media

Formal & Business

Human-verified examples from authoritative sources

Exact Expressions

4 human-written examples

These may occur simultaneously on a same day, or sequentially with some days in between.

BMC Pediatrics

Participants provided informed consent and were assigned to repeated measurements on a same day basis.

Acupuncture in Medicine

In many countries, the healthcare to these patients is delivered on a same day basis (that is, the same day the consultation occurs) by general practitioners (GPs) that have to find a spot in their busy agendas to visit these patients.

BMC Family Practice

On a same day, the cultures on multiwell slides were exposed to 0.2 Gy, 2 Gy or 10 Gy of X-ray radiation (X-RAD 320 Biological Irradiator unit, Precision X-Ray, Inc.; dose rate about 1 Gy/min; 320 kV, 12.5 mA), or were sham-irradiated at ambient temperature.

Plosone

Human-verified similar examples from authoritative sources

Similar Expressions

56 human-written examples

Fancy is not the only company offering same-day deliveries these days – Walmart has been working on a same-day delivery service (including groceries) called "Walmart To Go;" Google has Google Shopping Express; eBay launched eBay Now; and various startups like TaskRabbit, Postmates, Instacart, WunWun and others are also getting into the game.

TechCrunch

For those who can't get on a same-day flight, Continental arranges hotel rooms — the airline pays for rooms for mechanical delays, the passenger for weather delays.

The New York Times

ABC, a unit of the Walt Disney Company, started up a soap opera cable channel that will replay episodes of its programs on a same-day basis.

The New York Times

On logistic regression analysis, a maximum pain score ≥ 7 out of 10 in the postanesthesia recovery unit was the only significant predisposing factor for postoperative admission.Although over 50% of adult CF patients can successfully undergo ESS on a same-day discharge basis, it is prudent to have contingent plans for potential inpatient observation postoperatively.

Stanford University

The company had already been working with Target on a same-day delivery pilot program in New York's Tribeca neighborhood, prior to this deal.

TechCrunch

Google also operates a quick delivery service in certain markets that uses traditional automobiles to bring goods to consumers on a same-day basis.

TechCrunch

Meanwhile, Walmart has doubled down on a same-day pickup service for groceries, and even incentivized customers with discounts when online customers chose to ship items to the store for pickup instead of delivery.

TechCrunch

Expert writing Tips

Best practice

While grammatically permissible, consider using the more conventional phrasing "on the same day" for improved clarity and wider acceptance.

Common error

Avoid consistently using "on a same day" as it can sound unnatural to native English speakers. Opt for "on the same day" for a more polished and professional tone.

Linguistic Context

The phrase "on a same day" functions as an adverbial prepositional phrase, modifying a verb or clause to specify the timing of an action or event. Ludwig AI confirms its usability, though suggesting more common alternatives exist.

Expression frequency: Rare

Frequent in

Science

33%

News & Media

33%

Formal & Business

33%

Less common in

Encyclopedias

0%

Wiki

0%

Reference

0%

Ludwig's WRAP-UP

While grammatically understandable, the phrase "on a same day" is not the most common or stylistically preferred choice. As Ludwig AI indicates, it is better to use the more standard phrasing "on the same day". The phrase functions as an adverbial prepositional phrase, indicating that events occurred within the same 24-hour period. Although it appears in various contexts, including science, news and media, and formal business, it is considered rare. For improved clarity and a more polished tone, opt for "on the same day" in both formal and informal writing.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

on the same day

More common and grammatically standard phrasing.

that same day

Emphasizes the specific day being referred to.

that very day

Adds emphasis to the immediacy and specificity of the day.

on that day

Refers back to a previously mentioned day.

the day in question

Points to a particular day that is relevant to the context.

concurrently

Focuses on the simultaneous nature of events.

simultaneously

Highlights the events happening at the same time.

at the same time

General way to express simultaneity.

in the same timeframe

Wider time frame that encompasses the same day.

during the same period

Broader time period that includes the specific day.

FAQs

Is it grammatically correct to say "on a same day"?

While understandable, the phrasing "on a same day" is less common and can sound awkward. A more standard and widely accepted alternative is "on the same day".

What's a better way to phrase "on a same day"?

The most common and natural alternative is "on the same day". Depending on the context, you could also use "that same day" or "concurrently".

How does "on a same day" differ from "on the same day"?

The phrase "on the same day" is the standard and accepted phrasing. "On a same day" is less common and sounds slightly awkward to native English speakers.

Can I use "on a same day" in formal writing?

While not strictly incorrect, it's best to avoid "on a same day" in formal contexts. Opt for the more polished and widely accepted "on the same day" instead.