Five years earlier that the date in question. I leave the simple calculation to the student.
Seven years ago from today would be in 2016. If today's date is October 2023, then seven years prior would be the same date in October 2016.
To find the date of today, Saturday, 25 years ago, we subtract 25 years from the current date. If today is a Saturday in 2023, then 25 years ago would be a Saturday in 1998. For example, if today is October 21, 2023, then 25 years ago would be October 21, 1998.
The date 5 years ago today was [current date] - 5 years.
To find the date 900 years ago from today, you would subtract 900 from the current year, 2023. This brings you to the year 1123. Therefore, the date 900 years ago would be in the year 1123.
To find the date 1000 years ago from today, you would subtract 1000 years from the current year, 2023. This brings you to the year 1023. Therefore, if today is assumed to be October 5, 2023, then 1000 years ago would be October 5, 1023.
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.
To find the date 8 years ago from today, simply subtract 8 years from the current year, 2023. This brings us to 2015. Therefore, if today is October 4, 2023, the date 8 years ago would be October 4, 2015.
This depends on what today is. See the related link, "100 years ago today". To calculate late the date, subtract 100 from the current year, and use the same date. For example, of today were July 5, 2015, then 100 years ago would be July 5, 1915, since 2015 - 100 = 1915.
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.
To find the date that was 13 weeks ago from today's date, you would subtract 13 weeks from today's date. If today's date is August 12th, 2021, then 13 weeks ago would be May 13th, 2021.
Depending on what date you are thinking of, and what date it is today, it would vary a bit, but one could say approximately 3,010 years ago.
Since today is July 14, 2013, five years ago today it was July 14, 2008.