"If I wanted to go 6 years into the past, I would simply change that first argument to 'year'. 6 days? Change it to 'day'."

This is not the case, right? Changing it to year would have you go back to the beginning of the year 6 years ago, but would not go 6 years into the past. As in, it would go AT LEAST 6 years into the past. If we're in May 2022, then it would go back to January 2016, not May 2016.

Is there a way to go back exactly 6 years?