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 <petervince1952@gmail.com> 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 <tvb@leapsecond.com> wrote: > >> Thanks for the notice. Add these to your list: >> .... > > > >> 2147483648 0x80000000 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 2440000.5 = MJD 40000.0 >> 1995-10-10 00:00:00 UTC (DOY = 283, Tue) = JD 2450000.5 = MJD 50000.0 >> 2023-02-25 00:00:00 UTC (DOY = 56, Sat) = JD 2460000.5 = MJD 60000.0 >> >> /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.

 Peter

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

> 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