What was the date four weeks ago?

Answer 1

If the current date is after the 28th, four weeks ago was in the current month, and the date was <current date> - 28.

If the current date is before the 29th, four weeks ago was in the previous month, and...

• ... if the previous month was a 28-day February, the date was the same as the current date.
• ... if the previous month was a 29-day February, the date was <current date> + 1.
• ... if the previous month was April, June, September or November, the date was <current date> + 2.
• ... if the previous month was January, March, May, July, August, October or December, the date was <current date> + 3.

Answer 2

The answer to this will change depending on when it's answered or edited. As of May 30th, 2015 - 4 weeks ago was May 2nd, 2015.