Capture.JPG

Again ...

I changed the computer's date to 7/1/2020 (US format)

Opened the file

And this is what I see

Double clicking K2 changes nothing



I don't understand what you mean by these

Beginning of the first installment 1/7/2020
The end of the last installment 1/4/2021
With the beginning of 1/5/2021 the cell output will become blank.