19 Jan
2022
19 Jan
'22
2:04 a.m.
On 2022-01-19 01:57, Paul Koning wrote:
It is fairly good, but not perfect. I think it have been brought up that
there should be a 3200 year rule, beyond the 100 and 400 rule. The
Wikipedia article says it should be a 4000 year rule
(https://en.wikipedia.org/wiki/Gregorian_calendar#Accuracy). So either
I'm misremembering, or else there are some different ideas about this...
RSX will deal correctly with the 4/100/400 rules (which means we're
talking Gregorian). I think pretty much everything in RSX is secured up
until 2155, and before then I think the only problem is DECnet, and
things like FLX which deals with RT-11 filesystems.
Beyond 2155, a few more things will cause problems, but nothing
catastrophic.
Johnny
--
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at softjar.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
On Jan 18, 2022, at 7:48 PM, Johnny Billquist
<bqt at softjar.se> wrote:
By then, we probably also need to look at/revise how we compute leap years... It's
well known that the current algorithm will slowly get us out of phase again...
The Gregorian algorithm is amazingly accurate, I wonder if the earth rotation slowing
down is the bigger issue. Then again, I suspect a whole lot of computer date algorithms
will get 2100 wrong; I know RSTS has the Julian leap year rule. Not that it really
matters given the Y2035 issue...