Formula that updates spreadsheet when I change the dates

Excuse the dash board.. I had to remove a few things because it was for work.. But as you can see I have a bunch of text boxes linking to another page in the document. As of now, every month I would have to go in and change the reference for each text box and each graph.. In a perfect work I want to go to the data page, and put all my raw data in there, change the month on the dashboard page and have the graphs and text boxes update