### How do you find out what the date was 77 weeks ago?

Today being the 6th of September 2009, then 77 weeks ago was the 16th of March 2008. 77 weeks is 539 days ago. You can use lots of things, like a computer, to take 539 days from the current date. You can do it in a spreadsheet. If you put today's date in one cell, say cell A1, then in another cell you can put a formula to subtract 539 days from it and it…