first day of use

USAGE SUMMARY

The phrase "first day of use" is correct and usable in written English.
It can be used to refer to the initial day that something is utilized or put into operation. Example: "Please ensure that you complete the registration process by the first day of use to avoid any delays."

✓ Grammatically correct

News & Media

Science

Travel

Human-verified examples from authoritative sources

Exact Expressions

4 human-written examples

The pass is good for 14 days from the first day of use and costs $166 $1277 for children ages 3 to 9. (Individually, admission to these attractions would cost $237.95 $181.700 for children).

The New York Times - Travel

But that system sped up customer turnover so much that sales increased to $1,200 an hour, from $800, on the first day of use.

The New York Times

The Perfect Ten pass allows skiers to ski any combination of 10 days at any of the 5 resorts all season (except Dec. 15 to Jan . 1, as long as the first day of use is before Jan . 31

The New York Times - Travel

One single bienzyme biosensor responded within the control limits, set at ±3× the standard deviation of the currents measured on the first day of use, for more than 5 months.

Analytical Biochemistry

Human-verified similar examples from authoritative sources

Similar Expressions

56 human-written examples

My first day of using the service seemed so exciting - until the sole caller was my mum.

The Guardian - Tech

Our latest matching experiment made on 700 new users impressed us even more – they talked for over 25,000 minutes in the very first day of using the app".

TechCrunch

The NHI care program for PMV patients 17 years of age or older covers invasive ventilators, negative pressure ventilators, and positive pressure ventilators, under the condition that at least some use of an invasive ventilator or a negative pressure ventilator should be made prior to the first day of using a positive pressure ventilator [ 8].

BMC Health Services Research

A young father corroborated the assertion and said: " the use of AL has led to a marked reduction in time caregivers spend with a sick child because the children now recover promptly and by the second day of use many of the sick children were up and about".

BMC Health Services Research

The first day of prescription use for the treatment of HCV was assigned as the index date.

BMC Infectious Diseases

We used some simplifying assumptions in deriving the time window of infection and considered that all transmission activities took place on the first day of refuge use.

Behavioral Ecology and Sociobiology

Participants will be randomized after the last baseline visit (V2) and before the planned program set-up visit (V3), which is the first day of program use.

BMC Psychiatry

Expert writing Tips

Best practice

When referring to the start of a trial period, subscription, or guarantee, always clarify whether "first day of use" implies the activation date or the purchase date.

Common error

Avoid ambiguity by specifying whether the "first day of use" refers to the purchase date or the actual activation date, especially in contexts involving warranties or subscriptions.

Linguistic Context

The phrase "first day of use" functions as a prepositional phrase. It typically modifies a noun or verb, specifying the starting point of a period or activity. Ludwig AI confirms that the phrase is grammatically correct.

Expression frequency: Rare

Frequent in

Science

30%

News & Media

30%

Travel

20%

Less common in

Formal & Business

10%

Encyclopedias

5%

Wiki

5%

Ludwig's WRAP-UP

The phrase "first day of use" is a grammatically sound and usable expression, although it appears relatively infrequently. Ludwig AI confirms its correctness. It's commonly found in scientific and news contexts to establish a clear starting point. When using this phrase, ensure clarity by specifying whether it refers to the date of purchase, activation, or actual utilization. Alternatives like "initial use day" or "commencement of usage" may be suitable depending on the specific context.

More alternative expressions

Phrases that express similar concepts, ordered by semantic similarity:

initial use day

Replaces "first day" with "initial use", emphasizing the commencement of utilization.

start date of utilization

Replaces "first day of use" with a more formal term, focusing on the commencement date.

commencement of usage

Uses more formal synonyms to express the beginning of use.

inaugural day of application

Replaces "use" with "application", suggesting a more formal or technical context.

first time in service

Focuses on the initiation of service or operation.

debut day

Implies a public or noteworthy initial use.

opening day of operation

Suitable for describing the start of a business or service.

first instance of employment

Emphasizes the initial act of employing something.

maiden use

A more literary or old-fashioned term for first use.

premiere use

Suggests a first or important use, often in a performance context.

FAQs

How can I use "first day of use" in a sentence?

You can use "first day of use" to specify when something is initially utilized, as in "The warranty is valid for one year from the "first day of use"".

What's another way to say "first day of use"?

Alternatives include "initial use day", "start date of utilization", or "commencement of usage" depending on the context.

Is it correct to say "from the first day of use" or "since the first day of use"?

Both are grammatically correct, but "from the "first day of use"" implies a starting point, while "since the "first day of use"" indicates a duration from that point to the present.

What should I consider when determining the "first day of use" for a product?

Consider whether the "first day of use" refers to the date of purchase, activation, or actual consumption, and communicate this clearly to avoid confusion.