Some day or someday?
some day is an adverb meaning “On unspecified day in the future”; someday is an adverb meaning “Sometime; at some unspecified time in the future”. some day is written as two words and someday as one word; they are used differently.
What is the difference between some day and someday?
| some day | someday | |
|---|---|---|
| Part of speech | adverb | adverb |
| Meaning | On unspecified day in the future | Sometime; at some unspecified time in the future |
| Example | The baby will likely be born some day in December | none recorded |
| Pronunciation | not recorded | not recorded |
| In writing | not counted (the list counts single words) | 11 times per million words |
Sources: some day and someday in the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
Every current meaning of some day and someday
some day
- 1
On unspecified day in the future
The baby will likely be born some day in December
someday
- 1
Sometime; at some unspecified time in the future
Source: the English Wiktionary, dump of September 2, 2026 (CC BY-SA 4.0); obsolete, archaic, dialect and rare senses left out.
Which is more common, some day or someday?
some day is a phrase, which the list of single words does not count; someday 11 times per million words.
Source: written frequency: wordfreq 3.1 (a 2021 snapshot of Wikipedia, subtitles, news, books, web text and social media).
How many people search some day vs someday?
“some day vs someday” is searched about 480 times a month on Google and 20 on Bing in the United States. Google counts close variants of a query together (“someday vs some day”, “some day or someday”).
Sources: Google Ads keyword data through DataForSEO and Microsoft Advertising keyword data through DataForSEO, the average month from September 2025 to August 2026.