But one day vs However

When to use each in English, with meaning, register, and examples.

But one day

Top 2,000 (common)

However

Top 1,000 (very common)A1adverb
Most common: However
 But one dayHowever
Pronunciation🇬🇧 //bʌt wʌn deɪ//🇺🇸 //bʌt wʌn deɪ//🇬🇧 /["/haʊˈevə(r)/"]/🇺🇸 /["/haʊˈevər/"]/
MeaningA phrase used to introduce a story or change in events.but; shows contrast between two ideas.
ExampleBut one day, everything changed when the storm hit the village.He was feeling bad. He went to work, however, and tried to concentrate.
RegisterNeutralNeutral
How commonTop 2,000 (common)Top 1,000 (very common)
CEFR level-A1
Part of speechadverb
Collocationsbut one day my life changed, but one day everything went wrong, but one day she lefthowever, you should, however, it is important, however, I believe
Antonyms-therefore, consequently
Common mistakesUsing it in formal academic writing., Placing it in the middle of sentences instead of at the start., Confusing it with 'however' or other conjunctions.Confused with 'how ever' which means in what way., Omitting a comma before 'however' when it starts a sentence., Using 'however' inappropriately in very casual contexts.
Usage notesCommonly used in storytelling to indicate a turn or pivotal moment. It's suitable for informal and formal narratives but might feel out of place in direct, factual writing.Use 'however' to introduce a contrasting idea in a sentence. It's suitable in both spoken and written English but more common in formal writing. Avoid using it at the beginning of informal conversations.

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But one day
However

Frequently asked questions: But one day vs However

What's the difference between But one day and However?

But one day: A phrase used to introduce a story or change in events. However: but; shows contrast between two ideas.

Which is more common: But one day and However?

However is the most common in everyday English.

Can you show an example of each?

But one day: But one day, everything changed when the storm hit the village. However: He was feeling bad. He went to work, however, and tried to concentrate.

Can I use But one day and However interchangeably?

Not always. But one day and However are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.

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