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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
CEO of Professional Science Editing for Scientists @ prosciediting.com
two days prior
Grammar usage guide and real-world examplesUSAGE SUMMARY
"two days prior" is correct and usable in written English.
You can use it to refer to a timeline in the past, such as "I completed the project two days prior to the deadline."
✓ Grammatically correct
News & Media
Science
Academia
Wiki
Alternative expressions(20)
is equivalent to
in the wishes of
rapidly thereafter
for the immediate future
Very soon
somewhere later
one week before
at the early time
in the next weeks
during the previous years
it is important to remember
not yet completed
to avoid disruption
in accordance with direction from
a couple of books before
if not soon
in two days
as excellent as
in a flash
as instructed by the directive
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
60 human-written examples
But we didn't know until two days prior".
News & Media
Their last meeting was in Bungalow 3A, two days prior to her death.
News & Media
Just two days prior to the tragedy, Alice Springs News reported a wider crackdown.
News & Media
The fact that he killed a girl two days prior, it doesn't come up!
News & Media
Two days prior, the FBI had opened a counterintelligence investigation into Trump's campaign.
News & Media
Keenan delivered the first draft of the speech two days prior to the Saturday address.
News & Media
One or two days prior to treatment, all dogs were infested with 50 unfed adult ticks.
Science
NOTE: Tickets will be emailed to purchasers two days prior to the game.
Academia
"I just had barely started practicing two days prior to that," he said.
News & Media
Above: Women grieve over the casket of a young boy who had died two days prior in Luanda, Angola.
News & Media
He was believed to have passed away two days prior.
News & Media
Expert writing Tips
Best practice
Maintain consistency in your tense. If you're describing past events, make sure the surrounding sentences also use past tense for clarity.
Common error
Avoid ambiguity by clearly specifying what the "two days prior" refers to. Instead of saying "I finished the report two days prior", specify "I finished the report two days prior to the deadline".
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "two days prior" functions as an adverbial phrase of time, modifying a verb or clause to indicate when an action or event occurred in relation to another point in time. It indicates a temporal relationship, positioning an event as happening before another.
Frequent in
News & Media
42%
Science
40%
Academia
10%
Less common in
Wiki
5%
Formal & Business
3%
Ludwig's WRAP-UP
In summary, "two days prior" is a grammatically sound and frequently used phrase to denote an event that occurred 48 hours before a specific time. According to Ludwig, the phrase is correct and its common usage across various fields – including news, science and academia – shows its versatility. While it can be considered more formal than "two days before", its neutrality makes it suitable for diverse contexts. When using the phrase, clarity regarding the reference point is crucial to avoid ambiguity. Alternatives such as "48 hours before" or "two days preceding" can be used for slight variations in emphasis or formality.
More alternative expressions(6)
Phrases that express similar concepts, ordered by semantic similarity:
48 hours before
Replaces 'two days' with a specific time frame, emphasizing precision.
two days preceding
Replaces "prior" with a more formal term, "preceding".
two days in advance
Highlights the concept of acting or planning ahead.
two days before then
Adds a sense of retrospection, referencing a past event.
on the second day before
Adds emphasis with the more descriptive "on the second day".
earlier that same week
Broadens the time frame, indicating a time within the same week.
the day before yesterday
Indicates a specific day instead of a period of time.
two days ago
Uses a simpler and more direct phrasing, focusing on the elapsed time.
forty-eight hours earlier
Combines a specific timeframe with a more direct temporal marker.
the previous two days
Focuses on the duration leading up to the event.
FAQs
How do I use "two days prior" correctly in a sentence?
Use "two days prior" to indicate something that occurred 48 hours before a specific event or point in time. For example, "The tickets will be emailed to purchasers "two days prior" to the game".
What are some alternatives to saying "two days prior"?
You can use alternatives like "48 hours before", "two days preceding", or "two days in advance" depending on the context.
Is it better to say "two days before" or "two days prior"?
Both "two days before" and "two days prior" are grammatically correct and have the same meaning. "Two days before" is slightly more informal, while "two days prior" has a more formal tone.
What's the difference between "two days prior" and "the previous two days"?
"Two days prior" refers to a point in time 48 hours before a specific event. "The previous two days" refers to a period of 48 hours leading up to an event.
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Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
85%
Authority and reliability
4.5/5
Expert rating
Real-world application tested