[tz] isdst bug Europe/Dublin (tzdb-2019c)

[Guy Harris]

On Dec 15, 2019, at 5:22 AM, Michael H Deckers <michael.h.deckers at googlemail.com> wrote:

>     The notation of values of TAI using the Gregorian calendar is helpful
>     when comparing time scales.

So how is that defined?

Do you just take a UTC value for the same instant, add the current TAI - UTC delta to it - and, for overflow (meaning "resulting seconds > 59 or minutes > 59 or...), "carry into" the calendar date, so that an event that took place at the end of 2018, with a UTC label, took place at the beginning of 2019, with a TAI label?