[EMAIL PROTECTED] wrote on 01/16/2007 07:36:53 PM: > Okay, to be truly accurate - divide by 365.25. (3 * 365) + 366 = 1461 > total days in a four year span including a leap year. 1461 / 4 = > 365.25.
Actually, this isn't 100% accurate. There are quite a few dates for which this will generate an age that is off by one year. I created a demonstration program a long time ago to prove this, because we had a program that was using this logic. It never seemed quite right to me, and it is right *almost* every time. Calculating ages as of January 16, 2007 for all dates in the last ten years will show incorrect ages for January 16 of the following years: 1997, 1998, 2001, 2002, 2005, and 2006. For example, January 16, 2006 shows as zero years old (365/365.25 is less than 1). My preferred method of calculating age is to extract the month, day, and year of both dates and calculate the age as the difference between the years. Then, if the target MMYY is less than the birth MMYY, subtract one from the age. In other words, pretty much the way you would do it in your head - or at least the way I do it in my head. ;-) This also handles all leap-year rules, including those funky 100- and 400-year ones, which are not accommodated by simply dividing by 365.25. Tim Snyder Consulting I/T Specialist U2 Consulting North American Lab Services IBM Software Group ------- u2-users mailing list u2-users@listserver.u2ug.org To unsubscribe please visit http://listserver.u2ug.org/
