[Seizethecarp]

“Conception would be Nov 4, 1960 for a nine month pregnancy with birth Aug 4, 1961.”

You say this is wrong. What, then, is your calculation of a conception date for an August 4, 1961 full-term expected delivery date?

[RaceBannon]

december 4
december to jan 4 = 1 month
August is month 8

But, simple mistake, doesn’t make too much an issue

[Brown Deer]

It would most likely be somewhere in the range of Oct. 14, 1960 and Nov. 18, 1960. You stated a guess as a fact, so what you posted was wrong. In other words, you posted a date that you made up, what some might call nonsense.

[bgill]

The birth date is usually a week or so beyond the 9 month period. This calculator shows the deed was done on or about Oct. 28, 1960. What might be of interest is that Halloween that year was on Monday making the 28th a Friday. Could be SAD got a bit wild during a Halloween party that weekend. That could be a lead.

http://www.babymed.com/pregnancy-due-date-calculator?event=0&cycle_length=28&weeks=5&days=0&ivf_days=3&MM=10&DD=28&YYYY=2012&showResults=1