The short answer
Historic and historical are not interchangeable, even though they share a root. Historic describes something significant enough to be remembered, such as a historic treaty or a historic election. Historical simply means related to history or set in the past, whether or not the event mattered much. A historical novel is set in the past; a historic novel would be one that changed literature forever.
What each word means
Historic marks significance. A historic moment is one people will still talk about decades later, like the signing of a major peace agreement or the first flight across an ocean. Historical is broader and more neutral: it describes anything connected to history, whether famous or forgotten. A historical document might be a shopping list from 1850, remarkable only because it is old.
Because both words derive from the same adjective, history, writers often swap them without thinking. The safest test is to ask whether the thing being described is merely from the past, which calls for historical, or genuinely important, which calls for historic. When in doubt, historical is the safer default for anything simply set in an earlier era.
Historic vs. historical in example sentences
The council called the vote a historic decision that would change the town for generations. Not: The council called the vote a historical decision. The museum houses historical records dating back three centuries. Not: The museum houses historic records, unless those specific records are themselves famous. She studies historical linguistics, tracing how words changed over hundreds of years, and hopes one day to witness a historic breakthrough in the field.
- Historic: important, memorable, a turning point
- Historical: relating to the past, neutral in tone
- A historic site changed history; a historical site is simply old
Why the mix-up happens
The confusion exists because historic and historical both descend from the Latin historia and entered English as near-synonyms centuries ago. Over time, writers began reserving historic for events worth remembering and historical for anything simply belonging to the past. Style guides settled on this split during the twentieth century, but many speakers still use the words loosely in casual conversation, which is part of why the distinction feels slippery today.
A quick usage note
One detail trips up many writers: historic starts with a pronounced consonant sound, so it takes a, not an. Write a historic event, not an historic event, in standard American English, even though the older an historic still appears in some British writing. Consistency matters more than either choice, so pick one form and keep it throughout a single piece of writing.
Remember it
Picture historic events as the ones that would earn a line in a history book's table of contents, while historical describes anything that simply belongs to the study of history. If you can imagine someone saying we will remember this day, reach for historic; if you are just placing something in the past, historical is almost always the better fit.
Frequently asked questions
Is it 'a historic' or 'an historic'?
In American English, use a historic because the h is pronounced, giving the word a consonant sound. An historic appears mainly in British or older writing.
Can an event be both historic and historical?
Yes. Every historic event is also historical, since it happened in the past, but not every historical event is historic, because most past events were never especially significant.
Which word describes an old building?
Use historical for a building simply from an earlier era, and historic only if that specific building is tied to a well-known event or achievement.
Try it with a real collection
Explore academic vocabulary or print a Frayer model to put these ideas into practice.