http://en.wikipedia.org/wiki/Unix_time 0 is 1970 Jan 01 00:00:00 GMT or UTC (Starting point) 1 is 1970 Jan 01 00:00:01 GMT or UTC (1 second) 60 is 1970 Jan 01 00:01:00 GMT or UTC (1 minute) 3600 is 1970 Jan 01 01:00:00 GMT or UTC (1 hour) 86400 is 1970 Jan 02 00:00:00 GMT or UTC (1 day) 2678400 is 1970 Feb 01 00:00:00 GMT or UTC (31 days) 31536000 is 1971 Jan 01 00:00:00 GMT or UTC (365 days) 315532809 is 1980 Jan 01 00:00:00 GMT or UTC (i3650 days plus 2 leap days plus 9 leap seconds http://en.wikipedia.org/wiki/Leap_second )
On Tue, Mar 27, 2012 at 1:28 PM, Charles Mills <[email protected]> wrote: > So Gil, you are saying that a UNIX time of, for example, 60, represents 1:34 > am on 1/1/1970 -- or represents 0:26 am? (Theoretically -- there were no > leap seconds before 1970.) > > Charles > > -----Original Message----- > From: IBM Mainframe Discussion List [mailto:[email protected]] On Behalf > Of Paul Gilmartin > Sent: Tuesday, March 27, 2012 6:30 AM > To: [email protected] > Subject: Re: Assembler - convrssion of Epoch (Unix) time to printable > > On Tue, 27 Mar 2012 07:47:39 -0500, McKown, John wrote: > >> ..., the UNIX epoch is simply a number. The number of seconds since > 00:00:00 GMT 1 Jan 1970. It would be rather easy to convert to > yyyy-mm-ddThh:mm:ss if it weren't for the "leap seconds". Which may or may > not be of any interest to you. >> > Not really. In effect, the origin of NTP shifts by one second every time a > leap second occurs. It is now 00:00:34 GMT 1 Jan 1970; in a little over 3 > months it will be 00:00:35 GMT 1 Jan 1970. > > http://pubs.opengroup.org/onlinepubs/9699919799/xrat/V4_xbd_chap04.html > > ... it is inappropriate to require that a time represented as seconds > since the Epoch precisely represent the number of seconds between > the referenced time and the Epoch. > > ---------------------------------------------------------------------- > For IBM-MAIN subscribe / signoff / archive access instructions, > send email to [email protected] with the message: INFO IBM-MAIN -- 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 [email protected] with the message: INFO IBM-MAIN
