The phrase is a noun phrase, with the Swedish word "vecka" (week) serving as the head noun. The preceding elements, "11 sep" (an abbreviation for 11 September), function as an adjectival modifier that specifies which week is being referenced. Grammatically, the entire unit serves to name a specific period of time, thus functioning as a proper noun or a specific noun phrase.
In this construction, the date "11 sep" acts as a determiner, restricting the general noun "vecka" to a particular instance: the week containing the eleventh day of September. This method of temporal specification is common when anchoring a time frame to a significant or easily identifiable date, as an alternative to a numerical week system (e.g., "vecka 37"). The linguistic role of "11 sep" is to qualify the noun, making the entire phrase a compound term that identifies a unique entity.
For analytical or content purposes, treating the term as a noun is essential. It allows the phrase to function as the subject or object of a sentence, representing the central topic under discussion. This classification dictates its use in syntax and semantics, establishing it not as an action or description but as a specific, named conceptthe week of September 11th.
