bug#22034: time-utc->date shows bogus zone-dependent leap second

time-utc->date seems to think that a leap second occurs at a different time in each time zone: scheme@(guile-user)> (use-modules (srfi srfi-19)) scheme@(guile-user)> (define (tdate d) (write (list (date->string d "~4") (date->string (time-utc->date (date->time-utc d) 3600) "~4"))) (newline)) sche

bug#22033: time-utc format is lossy

In SRFI-19, round-tripping some UTC dates through the time-utc structure format, for the couple of seconds around a leap second: scheme@(guile-user)> (use-modules (srfi srfi-19)) scheme@(guile-user)> (define (tdate d) (write (list (date->string d "~4") (date->string (time-utc->date (date->time-ut