Backdating Summary Periods

I was wondering if it would ever be possible to change the dates of spending summary periods that have passed. I never used spending summary to its full potential until the start of this year and now i wanna go back and have a custom summary period for previous months instead of them just starting on the first of the month?

I like this idea. Sounds pretty interesting to be able to view my spending categories for a custom period, like the bills I’ve paid over an uneven period (e.g. 5 weeks).