When is your conception date if your due date is may 21st when is your conception date if your due date is june 2nd?

To estimate the conception date, subtract about 38 weeks (or 266 days) from the due date. For a due date of May 21st, the conception date would be around August 27th of the previous year. For a due date of June 2nd, the conception date would be approximately September 1st of the previous year.