Formula help

[CorinneS]

Hello!

I am trying to figure out how I can set a spreadsheet up so that when I add a start date & an end date in column D it auto populates all the rows dates based on the time frame of column B. Snip below for reference. 

[#2]

@CorinneS 

Not clear where you'd like to add dates, and there is the last date, last cell in column E?

In general if you have last date and would like to have the date on N days prior to it, it'll be =LastDate-N