A week yesterday, last Monday, etc.
Definition 1 of 1

Relative Time
Understand it pinpoints a day relative to today by referencing a previous day or week.

We caught up a week yesterday, and she's been better since.
Recent Reference
Use it to talk about the nearest past instance of a day or event.

Last Monday, our class started discussing Shakespeare.
Not Yesterday
Remember 'a week yesterday' isn't the same as 'one week ago' which could mean any day.

I met her a week yesterday, not last Tuesday.
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