Re: [time-nuts] A milestone approaches
> OpenVMS also has something to say about time: http://h41379.www4.hpe.com/openvms/products/year-2000/leap.html ... one of the most quoted classic bug report replies of all time. /tvb ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] A milestone approaches
Lady Heather has the date marked on her calendar (with a note to wear a clean pocket protector). Speaking of eventful dates... Trimble Thunderbolt dates rollover on 30 Jul 2017.Heather's automatic date rollover compensation should fix the date after 15 seconds... hopefully ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A milestone approaches
Good morning all - I hope you enjoyed the Unix 1.5 billion parties? An ex-colleague who used to work on VAX computers has just sent me this related message: OpenVMS also has something to say about time: . OpenVMS represents system time as the 64-bit number of 100ns intervals since midnight preceding November 17, 1858, which is the start of Modified Julian Day numbering. . . This 100 nanosecond granularity implemented within OpenVMS and the 63-bit absolute time representation (the sign bit indicates *absolute time* when clear and *relative time* when set) should allow OpenVMS trouble-free time computations up to 31-JUL-31086 02:48:05.47. At this instant, all clocks and time-keeping operations in OpenVMS will suddenly fail, since the counter will overflow and start from zero again. . . You may have to reset your oven timer after this point . . . Peter ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] A milestone approaches
I told Heather to display the time as Unix seconds and to do a screen dump at the Magic Moment... which was duly captured for posterity... Some poor souls are easily amused by such things... OK, there was a 1 millisecond delay for the dump to trigger. Receiver was a Thunderbolt.___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A milestone approaches
Hi I’ll put that on my calendar right away :) Yet another potential bug to check for in MJD code …. Bob > On Jul 13, 2017, at 1:51 PM, Peter Vince wrote: > > 2038 could be an "interesting" year - on the 22nd of April, the MJD hits > 65535 (2^16-1) ! > > > On 12 July 2017 at 13:19, Tom Van Baak wrote: > >> Thanks for the notice. Add these to your list: >> > > > >> 2147483648 0x8000 Tue Jan 19 03:14:08 2038 GMT (you survived) >> >> While we're at it, we have a rare T&F MJD event coming in 2023: >> >> 1968-05-24 00:00:00 UTC (DOY = 145, Fri) = JD 244.5 = MJD 4.0 >> 1995-10-10 00:00:00 UTC (DOY = 283, Tue) = JD 245.5 = MJD 5.0 >> 2023-02-25 00:00:00 UTC (DOY = 56, Sat) = JD 246.5 = MJD 6.0 >> >> /tvb >> >> > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A milestone approaches
2038 could be an "interesting" year - on the 22nd of April, the MJD hits 65535 (2^16-1) ! On 12 July 2017 at 13:19, Tom Van Baak wrote: > Thanks for the notice. Add these to your list: > > 2147483648 0x8000 Tue Jan 19 03:14:08 2038 GMT (you survived) > > While we're at it, we have a rare T&F MJD event coming in 2023: > > 1968-05-24 00:00:00 UTC (DOY = 145, Fri) = JD 244.5 = MJD 4.0 > 1995-10-10 00:00:00 UTC (DOY = 283, Tue) = JD 245.5 = MJD 5.0 > 2023-02-25 00:00:00 UTC (DOY = 56, Sat) = JD 246.5 = MJD 6.0 > > /tvb > > ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A milestone approaches
Hi Tom I passed this along to two of my old time computer gurus - I am sure they will want to celebrate!! 73, Bill, WA2DVU Cape May -Original Message- From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Tom Van Baak Sent: Wednesday, July 12, 2017 8:19 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] A milestone approaches Hi Bill, > Got this from a friend whose MN license plate is UNIX. Join the club! There's ~50 of us in the US: http://leapsecond.com/pages/unix/ > At that instant, billions of Linux and Unix computers and devices Plus embedded devices, such as Arduino, where 31-bit time_t C libraries are also used... > return time() == 15. It will not be until 2033 when that number > reaches 2 Billion. Thanks for the notice. Add these to your list: 1414213562 0x544b2fba Sat Oct 25 06:06:02 2014 GMT (sqrt 2) 1415926535 0x54655307 Fri Nov 14 00:55:35 2014 GMT (pi) 1420405752 0x54a9abf8 Sun Jan 04 21:09:12 2015 GMT (H-maser Hz) 15 0x59682f00 Fri Jul 14 03:40:00 2017 GMT (1.5 billion) 1616161616 0x6054ab50 Fri Mar 19 13:46:56 2021 GMT (pretty in dec) 1616928864 0x60606060 Sun Mar 28 10:54:24 2021 GMT (pretty in hex) 1717171717 0x6659f605 Fri May 31 17:08:37 2024 GMT (dec looking like oct) 1886417008 0x70707070 Thu Oct 11 13:43:28 2029 GMT (pretty in hex) 1985229328 0x76543210 Sun Nov 28 04:35:28 2032 GMT (hex digit countdown) 20 0x77359400 Wed May 18 04:33:20 2033 GMT (2 billion) 2004318071 0x Thu Jul 07 04:01:11 2033 GMT (pretty in hex) 2147483647 0x7fff Tue Jan 19 03:14:07 2038 GMT (end of time) 2147483648 0x8000 Tue Jan 19 03:14:08 2038 GMT (you survived) While we're at it, we have a rare T&F MJD event coming in 2023: 1968-05-24 00:00:00 UTC (DOY = 145, Fri) = JD 244.5 = MJD 4.0 1995-10-10 00:00:00 UTC (DOY = 283, Tue) = JD 245.5 = MJD 5.0 2023-02-25 00:00:00 UTC (DOY = 56, Sat) = JD 246.5 = MJD 6.0 /tvb ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A milestone approaches
My spouse's license plate is BEFUNGE. On Wednesday, July 12, 2017, Tom Van Baak wrote: > Hi Bill, > > > Got this from a friend whose MN license plate is UNIX. > > Join the club! There's ~50 of us in the US: http://leapsecond.com/pages/ > unix/ > > > > At that instant, billions of Linux and Unix computers and devices > > Plus embedded devices, such as Arduino, where 31-bit time_t C libraries > are also used... > > > > return time() == 15. It will not be until 2033 when that number > reaches 2 Billion. > > Thanks for the notice. Add these to your list: > > 1414213562 0x544b2fba Sat Oct 25 06:06:02 2014 GMT (sqrt 2) > 1415926535 0x54655307 Fri Nov 14 00:55:35 2014 GMT (pi) > 1420405752 0x54a9abf8 Sun Jan 04 21:09:12 2015 GMT (H-maser Hz) > 15 0x59682f00 Fri Jul 14 03:40:00 2017 GMT (1.5 billion) > 1616161616 0x6054ab50 Fri Mar 19 13:46:56 2021 GMT (pretty in dec) > 1616928864 0x60606060 Sun Mar 28 10:54:24 2021 GMT (pretty in hex) > 1717171717 0x6659f605 Fri May 31 17:08:37 2024 GMT (dec looking like oct) > 1886417008 0x70707070 Thu Oct 11 13:43:28 2029 GMT (pretty in hex) > 1985229328 0x76543210 Sun Nov 28 04:35:28 2032 GMT (hex digit countdown) > 20 0x77359400 Wed May 18 04:33:20 2033 GMT (2 billion) > 2004318071 0x Thu Jul 07 04:01:11 2033 GMT (pretty in hex) > 2147483647 0x7fff Tue Jan 19 03:14:07 2038 GMT (end of time) > 2147483648 0x8000 Tue Jan 19 03:14:08 2038 GMT (you survived) > > While we're at it, we have a rare T&F MJD event coming in 2023: > > 1968-05-24 00:00:00 UTC (DOY = 145, Fri) = JD 244.5 = MJD 4.0 > 1995-10-10 00:00:00 UTC (DOY = 283, Tue) = JD 245.5 = MJD 5.0 > 2023-02-25 00:00:00 UTC (DOY = 56, Sat) = JD 246.5 = MJD 6.0 > > /tvb > > ___ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > -- William H Fite, PhD Independent Consultant Statistical Analysis & Research Methods ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A milestone approaches
Hi Bill, > Got this from a friend whose MN license plate is UNIX. Join the club! There's ~50 of us in the US: http://leapsecond.com/pages/unix/ > At that instant, billions of Linux and Unix computers and devices Plus embedded devices, such as Arduino, where 31-bit time_t C libraries are also used... > return time() == 15. It will not be until 2033 when that number > reaches 2 Billion. Thanks for the notice. Add these to your list: 1414213562 0x544b2fba Sat Oct 25 06:06:02 2014 GMT (sqrt 2) 1415926535 0x54655307 Fri Nov 14 00:55:35 2014 GMT (pi) 1420405752 0x54a9abf8 Sun Jan 04 21:09:12 2015 GMT (H-maser Hz) 15 0x59682f00 Fri Jul 14 03:40:00 2017 GMT (1.5 billion) 1616161616 0x6054ab50 Fri Mar 19 13:46:56 2021 GMT (pretty in dec) 1616928864 0x60606060 Sun Mar 28 10:54:24 2021 GMT (pretty in hex) 1717171717 0x6659f605 Fri May 31 17:08:37 2024 GMT (dec looking like oct) 1886417008 0x70707070 Thu Oct 11 13:43:28 2029 GMT (pretty in hex) 1985229328 0x76543210 Sun Nov 28 04:35:28 2032 GMT (hex digit countdown) 20 0x77359400 Wed May 18 04:33:20 2033 GMT (2 billion) 2004318071 0x Thu Jul 07 04:01:11 2033 GMT (pretty in hex) 2147483647 0x7fff Tue Jan 19 03:14:07 2038 GMT (end of time) 2147483648 0x8000 Tue Jan 19 03:14:08 2038 GMT (you survived) While we're at it, we have a rare T&F MJD event coming in 2023: 1968-05-24 00:00:00 UTC (DOY = 145, Fri) = JD 244.5 = MJD 4.0 1995-10-10 00:00:00 UTC (DOY = 283, Tue) = JD 245.5 = MJD 5.0 2023-02-25 00:00:00 UTC (DOY = 56, Sat) = JD 246.5 = MJD 6.0 /tvb ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
Re: [time-nuts] A milestone approaches
In message , "Bill Hawkins" writes: >On Thursday night, 21:40 PM CST, it will be exactly 1.5 billion seconds >since Jan 1, 1970 UT, the Unix EPOCH. We threw a big "uptime(1)" party for the entire UNIX ecosystem here in Denmark back when 1e9 seconds rolled around :-) -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@freebsd.org | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
[time-nuts] A milestone approaches
Got this from a friend whose MN license plate is UNIX.
Begin copy of note
I'm curious if your friends on the time wizards mailing list have
noticed that an important moment in computer history approaches.
On Thursday night, 21:40 PM CST, it will be exactly 1.5 billion seconds
since Jan 1, 1970 UT, the Unix EPOCH. At that instant, billions of
Linux and Unix computers and devices, everywhere on the planet, will all
return time() == 15. It will not be until 2033 when that number
reaches 2 Billion. The Thursday date is computed as follows:
% cat >epoch.c
#include
#include
#include
int main(int argc, char **argv) {
const time_t gsec = 1.5e9;
struct tm thursday = *localtime(&gsec);
char buf[100];
strftime(buf, sizeof(buf), "%m/%d/%y %H:%M:%S", &thursday);
printf("Epoch + 1.5B seconds = %s\n", buf);
return 0;
}
% gcc -Wall epoch.c
% ./a.out
Epoch + 1.5B seconds = 07/13/17 21:40:00
%
And if they haven't noticed, it might be a good time to point it out.
End copy of note
Some of us are impressed by long strings of zeros, so here I am,
pointing it out.
Bill Hawkins
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