Which sentence is correct?
She didn't show up in the day before yesterday and today.
She doesn't show up in the day before yesterday and today.
What tense should be used in this case? If it's "yesterday and today", I can use "she hasn't shown up from yesterday". I use "the day before yesterday and today" to make the time more distinct, and for that implying that yesterday she did show up.
I am aware that none of the example may not make sense. If so, do you have any better choice?