Since today is July 14, 2013, five years ago today it was July 14, 2008.
Five years earlier that the date in question. I leave the simple calculation to the student.
The date 5 years ago today was [current date] - 5 years.
As of July 21, 2010, the date 25 months ago today was June 21, 2008.
As today is the 17th of March 2018, then 29 years ago it was the 17th of March 1989.
1913 (2013)
19 years ago today it was Wednesday May 27, 1998.
To find the date 82 years ago from today, you subtract 82 years from the current year, 2023. This brings you to 1941. If today is October 4, 2023, then 82 years ago would be October 4, 1941.
Sunday, January 1st, 1995
To determine a date 3,900 years ago from today, you would subtract 3,900 from the current year, 2023. This gives you the year 1877 BCE (Before Common Era). Therefore, 3,900 years ago from today is approximately in the year 1877 BCE.
Quite a bit less then today.
It was probably last month, the same weekday as today. Sometimes it will be 2 months ago and you will have to turn the calendar page back down to see it. If the date is January 29, five weeks ago was Christmas (of last year).
To find the date and day 32 years ago from today, which is October 30, 2023, we subtract 32 years. This brings us to October 30, 1991, which was a Wednesday.