proper preposition

[true will]

Hello . How are you ?

Could you please declare which of these preposition should i choose

she cooks ( on - at - in ) the weekends ?

Thanks in advance

 

[TheParser]

Hello . How are you ?

Could you please declare which of these preposition should i choose

she cooks ( on - at - in ) the weekends ?

Thanks in advance

***NOT A TEACHER***I am PRETTY sure that MOST Americans feel the most comfortable with ON the weekend(s).

 

[mara_ce]

at the weekend (British English)
I never work at the weekend.

on the weekend (American English)
What are you doing on the weekend?