How to Say "weeks" in Spanish
The Spanish word for “weeks” is “semanas” — A1 level. This is a very common word in everyday Spanish.

Examples
Nos vamos de vacaciones por dos semanas.
We're going on vacation for two weeks.
Han pasado varias semanas desde la última vez que hablamos.
Several weeks have passed since the last time we talked.
El proyecto tardará unas tres semanas en completarse.
The project will take about three weeks to complete.
It's Just the Plural of 'Semana'
'Semanas' is the plural form of 'semana' (week). You just add an 's' to the end to talk about more than one, just like in English!
Always Feminine
Remember that 'semana' is a feminine word. This means you always use feminine words like 'las', 'unas', or 'dos' with 'semanas'. For example, say 'las dos semanas' (the two weeks).
Using 'los' instead of 'las'
Mistake: “Estuve allí por los tres semanas.”
Correction: Estuve allí por las tres semanas. Because 'semana' is a feminine word, its plural form 'semanas' also needs the feminine article 'las' (the) or 'unas' (some).
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