Re: [LEAPSECS] Civil timekeeping before 1 January 1972

2015-03-09 Thread Tony Finch
Brooks Harris bro...@edlmax.com wrote: On 2015-03-07 03:01 PM, Steve Allen wrote: I would say that the intent NTP and POSIX is to correspond to civil time in contemporary use. Therefore, for dates before 1972-01-01 NTP and POSIX are counting seconds of UT. This paragraph in your email

Re: [LEAPSECS] Civil timekeeping before 1 January 1972

2015-03-09 Thread Brooks Harris
On 2015-03-09 08:40 AM, Tony Finch wrote: Brooks Harris bro...@edlmax.com wrote: On 2015-03-07 03:01 PM, Steve Allen wrote: I would say that the intent NTP and POSIX is to correspond to civil time in contemporary use. Therefore, for dates before 1972-01-01 NTP and POSIX are counting seconds

Re: [LEAPSECS] Civil timekeeping before 1 January 1972

2015-03-09 Thread Tom Van Baak
leap59 and leap61 are Leap Second announce signals, set 12 hours prior to the insert. There has been discussion about when the official announcements and expiration should be announced. ITU Rec 460 says ...at least eight weeks in advance. PTP can't do that, a point to keep in mind.

Re: [LEAPSECS] Civil timekeeping before 1 January 1972

2015-03-09 Thread Brooks Harris
On 2015-03-09 02:10 PM, Tom Van Baak wrote: leap59 and leap61 are Leap Second announce signals, set 12 hours prior to the insert. There has been discussion about when the official announcements and expiration should be announced. ITU Rec 460 says ...at least eight weeks in advance. PTP can't do