a week yesterday, last Monday, etc.

a week yesterday

A week and a day before today. I last saw Stu a week yesterday, before he left on vacation.
See also: week, yesterday
Farlex Dictionary of Idioms.

a ˌweek ˈyesterday, last ˈMonday, etc.

(especially British English) seven days before the day that you mention: It was a week yesterday that we heard the news.
See also: last, week
Farlex Partner Idioms Dictionary
See also:
  • a week yesterday/last (some day)/etc.
  • inside a week
  • tomorrow
  • by the week
  • week in and week out
  • week in, week out
  • yesterday
  • Friday
  • Monday
  • a week yesterday