According to our calendar the average length of a year (the time required for Earth to orbit the sun exactly once) is exactly 365.2425 days:
Non-leap years have 365 days. Add to that a leap day every for years = 1/4 d/y = +0.25 Subtract from that one leap day every century = 1/100 d/y = -0.01 Add back the leap day of every fourth century (like Y2K) = 1/400 d/y = +0.0025 365 + 0.25 - 0.01 + 0.0025 = 365.2425. For people born in the 20th century who are still alive (like me) the average length of the year is exactly 365.25 days since Y2K was a leap year. As these people age, the actual anniversary of their birth (when they exactly complete an integer number of solar revolutions) comes earlier and earlier with respect to the calendar anniversary of their birth moment. In some cases, like mine, your birthday can come the day before you celebrate it. Regards, Stephen Markson ForenSys The Forensic Systems Group www.ForensicSystemsGroup.com 416 482 2140 > -----Original Message----- > > Actually you want to use 365.25 instead of 365 or else you will be off a > little as they get older. > > Troy ================================================ TO SEE MESSAGE POSTING GUIDELINES: Send a plain text email to [EMAIL PROTECTED] In the message body, put just two words: INTRO rbase-l ================================================ TO UNSUBSCRIBE: send a plain text email to [EMAIL PROTECTED] In the message body, put just two words: UNSUBSCRIBE rbase-l ================================================ TO SEARCH ARCHIVES: http://www.mail-archive.com/rbase-l%40sonetmail.com/
