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
CEO of Professional Science Editing for Scientists @ prosciediting.com
it's ancient history
Grammar usage guide and real-world examplesAlternative expressions(20)
water under the bridge
that's old news
it is forgotten
it's water under the bridge
it belongs to the past
it is long gone
let bygones be bygones
the issue is resolved
forget about it
time heals all wounds
there's no use crying over spilled milk
it is what it is
the die is cast
cross that bridge when you come to it
what's done is done
move on
get over it
no use crying over spilled milk
don't cry over spilled milk
that's in the past
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
14 human-written examples
Andersen's response: It's ancient history.
News & Media
Andersen's response to all this: It's ancient history.
News & Media
So pick up Tim Weiner's new book and don't for a second imagine that it's ancient history.
News & Media
"It's ancient history.
News & Media
It's ancient history for me.
News & Media
It's ancient history, of course.
News & Media
Human-verified similar examples from authoritative sources
Similar Expressions
46 human-written examples
The "white man's burden" is not history; it is ancient history.
News & Media
I did have a drug problem 20 years ago but it is ancient history and has been resolved".
News & Media
Textbooks dwell on China's humiliations at the hands of foreign powers in the 19th century as if they took place yesterday, yet skim over the Cultural Revolution of the 1960s and '70s as if it were ancient history.
News & Media
But, actually, he filmed it over a year ago - it was one of the first things he did after his accident - so it is ancient history now and there is a lot of, 'Come on, brain!' while he struggles to remember the names.
News & Media
Much of it is ancient history, long-dead ancestors whose dalliances are part of the intrigue of amateur genealogy.
News & Media
Expert writing Tips
Best practice
This phrase is particularly effective in interviews or journalism to pivot away from old scandals toward current achievements
Common error
Do not use this phrase in formal academic historical writing to refer to actual ancient periods like the Roman Empire or Ancient Egypt. In those contexts, use the noun phrase "ancient history" without the contraction "it's", as the idiomatic framing implies that the subject is irrelevant or 'over', which contradicts the objective study of the past.
Source & Trust
96%
Authority and reliability
4.8/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "it's ancient history" functions as a metaphorical predicate where the subject 'it' is identified with a distant historical era to imply total irrelevance. In the examples provided by Ludwig, the phrase typically serves as a conversational closer or a rhetorical device to dismiss previous controversies.
Frequent in
News & Media
75%
Academia
15%
Formal & Business
10%
Less common in
Science
5%
Wiki
3%
Social Media
2%
Ludwig's WRAP-UP
The phrase "it's ancient history" is a robust and versatile idiom used to relegate past events to a state of irrelevance. Analysis from Ludwig AI confirms that while the literal phrase "it is ancient history" exists, the contracted form is much more prevalent in dynamic storytelling and journalism. It is most effective when used to pivot a conversation or to signal forgiveness. Writers should be careful to use it figuratively; in literal historical contexts, the metaphor can inadvertently imply that actual history is unimportant. Overall, it remains a staple of the English language for effectively closing the door on the past.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
it's water under the bridge
Emphasizes that past events cannot be changed and should no longer be a source of conflict
it's a thing of the past
Focuses on the obsolescence of a practice or condition
that's old news
Suggests the information is already well-known and no longer interesting
it belongs to the past
A slightly more literal and formal way to categorize an event
it's in the rearview mirror
Uses a driving metaphor to describe something left behind
that's over and done with
Stresses the finality and completion of a situation
it is long gone
Implies a significant passage of time since the event occurred
it's a closed chapter
Metaphor suggesting a story or phase of life has ended
it's bygone
A more poetic or slightly archaic adjective for the same concept
it is long forgotten
Specifically emphasizes that people no longer remember the event
FAQs
How do I use "it's ancient history" in a sentence?
You can use it to dismiss a past event, for example: "We had our disagreements in the first year of the project, but now "it's ancient history"." It functions similarly to "water under the bridge".
What is the meaning of "it's ancient history"?
It is an idiomatic expression used to describe something that happened a long time ago and is no longer important or relevant. It is often used to forgive past mistakes or move on from old news.
Is "it's ancient history" formal or informal?
The phrase is generally considered neutral to informal. While it appears frequently in reputable news sources like The New York Times, it is usually found in quotes or opinion pieces rather than formal scientific reports.
What can I say instead of "it's ancient history"?
Depending on the tone you want, you could use "it's a thing of the past", "that's old news", or simply "it is forgotten".
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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
96%
Authority and reliability
4.8/5
Expert rating
Real-world application tested