idag

Idag is a Nordic word that means "today." In Swedish, the standard spelling is idag (one word). In Danish and Norwegian, the common form is written as two words: i dag. The term functions as a temporal adverb used to refer to the current day.

The origin of the word is from the phrase i dag, meaning "on this day." As a time expression, idag specifies the present day or the current date within sentences. It does not change form to reflect different subjects or tenses, since it is an invariable adverb.

In usage, idag appears in everyday speech, writing, and media to indicate the present day. It can introduce events, statements, or descriptions tied to the current day. Examples include sentences such as "Idag är det soligt" or "Vad händer idag?" In Swedish, idag is typically written as a single word, while Danish and Norwegian texts commonly use the two-word form i dag.

Culturally and commercially, idag is a familiar term in Nordic contexts and can appear in headlines, signage, or as part of branding and publication titles. Because it denotes the present day, the word is frequently used in news media, calendars, and public communications to anchor content to the current date.