| Part of speech | common noun |
|---|---|
| Gender | common |
| Singular | Plural | |||
|---|---|---|---|---|
| Indefinite | Definite | Indefinite | Definite | |
| Nominative | dag | dagen | dage | dagene |
| Genitive | dags | dagens | dages | dagenes |
| Afrikaans | dag |
|---|---|
| Albanian | ditë |
| Catalan | dia |
| Czech | den |
| Dutch | dag |
| English | day |
| English (Old English) | dæg |
| Esperanto | tago |
| Faeroese | dagur |
| Finnish | päivä |
| French | jour |
| German | Tag |
| Greek | ηπέρα; μέρα |
| Hawaiian | ao; lā |
| Hungarian | nap |
| Icelandic | dagur |
| Italian | giorno; dì |
| Jamaican Patois | die |
| Latin | dies |
| Low German | dag |
| Luxemburgish | Dag |
| Malay | hari; siang |
| Norwegian | dag |
| Papiamento | dia |
| Polish | dzień |
| Portuguese | dia |
| Romanian | zi |
| Russian | день |
| Saterland Frisian | Dai |
| Scots | day |
| Scottish Gaelic | latha; là |
| Spanish | día |
| Sranan | dey |
| Swahili | mchana |
| Swedish | dag |
| Tagalog | araw |
| Thai | กลางวัน; วัน |
| Turkish | gün; gündüz |
| Welsh | dydd; diwrnod |
| West Frisian | dei |
| Yiddish | טאָג |