The question was asked on Wednesday the 19th of February 2014. The answer for that date would be Friday the 22nd of November 2013.
Twelve weeks and four days ago. There's seven days in a week, so 12 weeks and four days is 88 days ago. 88 days ago, from today, was 2021-04-12.
To calculate the date 35 weeks ago from today, you can subtract 35 weeks (which is 245 days) from today's date. If today is October 5, 2023, then 35 weeks ago would be January 12, 2023.
The 2nd
Your hunch is right; the ultrasound date is based on the day your last period ended. So, on average, the 40 week pregnancy begins two weeks before conception has even occured.
To determine the date 12 weeks from today, simply add 84 days to today's date. If today is October 4, 2023, adding 84 days brings you to December 27, 2023.
Twelve weeks from July 9, 2012, is September 24, 2012. This is calculated by adding 12 weeks (or 84 days) to the original date.
Twelve weeks from April 2 is June 25. To calculate this, you add 12 weeks (or 84 days) to April 2, resulting in the date of June 25.
Twelve weeks from May 1st would be July 24th. This is calculated by adding 84 days (12 weeks) to May 1st, which brings you to that date in July.
=there are 84 days in 12 weeks==there are 84 days in 12 weeks==there are 84 days in 12 weeks=
Twelve weeks from January 21 is April 14. Since there are 7 days in a week, 12 weeks equals 84 days. Adding 84 days to January 21 brings you to April 14.
Adding 12 weeks, that is, 84 days, to June 14 in any year gives September 6.
Six weeks from now is 42 days. If today is a specific date, you can simply add 42 days to that date to find the exact date six weeks from now. For example, if today is October 1, six weeks from now would be November 12.