Final answer:
The Spanish expression to describe something that happened last year is "El año pasado".
Step-by-step explanation:
The Spanish expression that would be used to describe something that happened last year is "El año pasado".
For example, if you wanted to say "I went to the beach last year", in Spanish you would say "Fui a la playa el año pasado".
This expression is commonly used to refer to events or actions that took place in the previous calendar year.
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