Update multiple cells based on value in another cell

I can usually figure out formulas so long as I know which one to use... But I don't know which one applies in this case.
I have a template that I was to reference from a seperate sheet, and I want to be able to just change the cell reference at the top of the template (which is the date) and have the rest of the template update with with the corresponding information in the same row as that cell.
So if on the template I change the date to reference A8, I want other cells in the template to automatically reference the data from the other cells in that row.
Does that make sense?
To me it sound seasy but I just can't crack it, can anyone help?