The International Astronomical Union uses the Julian Date / Time format. 0 was at January 1, 4713 BCE Greenwich noon, increments by 1 per day, decimal fraction of day for time. http://en.wikipedia.org/wiki/Julian_day
Various Gregorian calendar formats, including a list by country. http://en.wikipedia.org/wiki/Calendar_date Displays a date in various calendar formats. Links to many explanations of various Calendars. http://www.calendarhome.com/converter/ On Fri, Aug 13, 2010 at 11:32 AM, McKown, John <john.mck...@healthmarkets.com> wrote: > There are two that I know of which you did not mention. Lilian and COBOL. > COBOL is an integer which is the number of days since 31Dec1600. Lilian is an > integer which is the number of days since 14Oct1582. > > -- > John McKown > Systems Engineer IV > IT > > Administrative Services Group > > HealthMarkets® > > 9151 Boulevard 26 . N. Richland Hills . TX 76010 > (817) 255-3225 phone . (817)-691-6183 cell > john.mck...@healthmarkets.com . www.HealthMarkets.com > > Confidentiality Notice: This e-mail message may contain confidential or > proprietary information. If you are not the intended recipient, please > contact the sender by reply e-mail and destroy all copies of the original > message. HealthMarkets® is the brand name for products underwritten and > issued by the insurance subsidiaries of HealthMarkets, Inc. -The Chesapeake > Life Insurance Company®, Mid-West National Life Insurance Company of > TennesseeSM and The MEGA Life and Health Insurance Company.SM > > > >> -----Original Message----- >> From: IBM Mainframe Discussion List >> [mailto:ibm-m...@bama.ua.edu] On Behalf Of zMan >> Sent: Friday, August 13, 2010 11:25 AM >> To: IBM-MAIN@bama.ua.edu >> Subject: Date formats >> >> How many different date formats are there? There's the hardware >> timestamp, in two forms (original, with the 2046 rollover, and the >> extended one -- what is that, a STCKE instruction?). There's something >> called an "Oracle format date". There's some UNIX format that rolls >> over in 2034 or some such (tsk, with an epoch of 1970 -- they sure >> weren't planning ahead!), too. >> >> Not to mention yy/mm/dd, mm/dd/yy, dd/mm/yy, with 2- and 4-digit >> dates, varying separators (or no separators: yyyymmdd et al.), with >> and without leading zeroes (when there are separators: today as >> 8/13/2010 vs. 08/13/2010). And of course (the misnamed) Julian format. >> >> Rexx has a few others, but they're conveniences, like the number of >> days this year -- I don't really consider that a date format, though >> it's useful sometimes. >> >> What others are there? I'm working on something that will flexibly >> handle dates, and while I'm not sure I'll handle every format >> possible, I'd at least like to make the decision based on a pretty >> complete set of possible formats. >> -- >> zMan -- "I've got a mainframe and I'm not afraid to use it" -- Mike A Schwab, Springfield IL USA Where do Forest Rangers go to get away from it all? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
