Month Timeframe customisation in Tiller Foundation Template


Relatively new to using Tiller, and getting my head around the base Tiller HQ template. I’m fairly competent with Excel, but not an expert.
The way our financial situation work is that income comes in on the 15 or 16th of each month and I’d like to base the calculations of all figures based on the 15th of one month - 14th of the next month. Trying to figure that out with the template formulas has been a bit tricky.

I think the main place those dates would be important would be in budgeting. In the Budget Plan template, you could choose the frequency ‘Monthly’ and set a start date of ‘1/15/23’.