“No, we study to know when a day is a day to us and when a day is a day to God:”
Then you must have some rule or principle that you can tell us, so that we can apply that principle consistently in determining which is which. Do you have such a principle? Or do you just choose “a day” or “a thousand years” depending on what is convenient for you?
We are instructed to rightly divide the Word. It takes a lifetime of study to make good progress in rightly dividing the Word. If it were easy, none of us would disagree on what the bible says. There are two billion Christians and 2 billion opinions on what the Word says because the Word is pregnant, one can never reach full wisdom in the flesh as Jesus did.