April 26, 2021
9:06 p.m.
On 2021-04-26, at 13:15:22, Kerry Shetline via tz wrote:
...
* There is a fixed, defined relationship between POSIX time and future calendar dates and times, but that isn't true for TAI.
POSIX time is really just UTC without the leap seconds, isn’t it?
More precisely, POSIX time counts non-leap seconds since 1972-01-01t00:00:00 UTC. Is there a problem other than ambiguity: that 2016-12-31t23:59:60 UTC and 2017-01-01t00:00:00 UTC are represented by the same POSIX time? Doesn't TAI use the Gregorian calendar, so 2017:01:01t00:00:00 TAI is 2016:12:31t23:59:23 UTC. That's just a timezone convention -- the date may differ among various timezones. -- gil