Dataview list based on PREVIOUS month

I am very grateful to you for your time and help. Pure genius, and much better than anything I tried by myself.

When I add your query, it returns three days in July:

2021-07-29-Thursday
2021-07-30-Friday
2021-07-31-Saturday

It only returns three days because this journal was originally created in Bear, and all of the other days in July 2021 were created in February 2021. The modified date doesn’t work either as it captures lots of files in the rest of the journal that were modified in July.

But I feel as though I am getting closer.

If I work out a solution, I will post it here.

Many thanks.

Angel