context

What sort of context do sentences "We did it tomorrow last year" and "We do / have done it tomorrow every year" need in order to be correct and natural?

Thank you.

I cannot think of any context in which "We did it tomorrow last year" could be grammatically correct. It's nonsense.

The second one could be used as "We have done it the next day every year" as long as it's clear what "the next day" refers to.

"Tomorrow" refers only to the day after today.

(Cross-posted with Piscean) *I have to disagree with Piscean's usage of "We did it tomorrow last year". I would use "We did it the next day last year". "The next day" = "the day after day two".

What about this usage of "tomorrow": If you had been coming tomorrow, you would have met my mother.

[The sentence from The Oxford Dictionary of English Grammar by Sylvia Chalk and Edmund Weiner, 1994 edition (p. 287).]