RE: question about asia/baku 1992

This partial output from "zdump -v Asia/Baku" indicates that there is indeed something peculiar happening around 1991 and 1992; does anyone know if the output reflects reality? --ado ... Asia/Baku Sat Mar 24 21:59:59 1990 UTC = Sun Mar 25 01:59:59 1990 BAKT isdst=0 Asia/Baku Sat Mar 24 22:00:00 1990 UTC = Sun Mar 25 03:00:00 1990 BAKST isdst=1 Asia/Baku Sat Sep 29 21:59:59 1990 UTC = Sun Sep 30 02:59:59 1990 BAKST isdst=1 Asia/Baku Sat Sep 29 22:00:00 1990 UTC = Sun Sep 30 02:00:00 1990 BAKT isdst=0 Asia/Baku Sat Mar 30 21:59:59 1991 UTC = Sun Mar 31 01:59:59 1991 BAKT isdst=0 Asia/Baku Sat Mar 30 22:00:00 1991 UTC = Sun Mar 31 02:00:00 1991 BAKST isdst=1 Asia/Baku Thu Aug 29 19:59:59 1991 UTC = Thu Aug 29 23:59:59 1991 BAKST isdst=1 Asia/Baku Thu Aug 29 20:00:00 1991 UTC = Fri Aug 30 00:00:00 1991 AZST isdst=1 Asia/Baku Sat Sep 28 22:59:59 1991 UTC = Sun Sep 29 02:59:59 1991 AZST isdst=1 Asia/Baku Sat Sep 28 23:00:00 1991 UTC = Sun Sep 29 02:00:00 1991 AZT isdst=0 Asia/Baku Sat Mar 28 19:59:59 1992 UTC = Sat Mar 28 22:59:59 1992 AZT isdst=0 Asia/Baku Sat Mar 28 20:00:00 1992 UTC = Sun Mar 29 00:00:00 1992 AZST isdst=1 Asia/Baku Sat Sep 26 18:59:59 1992 UTC = Sat Sep 26 22:59:59 1992 AZST isdst=1 Asia/Baku Sat Sep 26 19:00:00 1992 UTC = Sat Sep 26 22:00:00 1992 AZT isdst=0 Asia/Baku Sat Sep 26 22:59:59 1992 UTC = Sun Sep 27 01:59:59 1992 AZT isdst=0 Asia/Baku Sat Sep 26 23:00:00 1992 UTC = Sun Sep 27 03:00:00 1992 AZT isdst=0 Asia/Baku Sun Dec 31 19:59:59 1995 UTC = Sun Dec 31 23:59:59 1995 AZT isdst=0 Asia/Baku Sun Dec 31 20:00:00 1995 UTC = Mon Jan 1 01:00:00 1996 AZST isdst=1 Asia/Baku Sun Oct 27 00:59:59 1996 UTC = Sun Oct 27 05:59:59 1996 AZST isdst=1 Asia/Baku Sun Oct 27 01:00:00 1996 UTC = Sun Oct 27 05:00:00 1996 AZT isdst=0 Asia/Baku Sat Mar 29 20:59:59 1997 UTC = Sun Mar 30 00:59:59 1997 AZT isdst=0 Asia/Baku Sat Mar 29 21:00:00 1997 UTC = Sun Mar 30 02:00:00 1997 AZST isdst=1 Asia/Baku Sat Oct 25 19:59:59 1997 UTC = Sun Oct 26 00:59:59 1997 AZST isdst=1 Asia/Baku Sat Oct 25 20:00:00 1997 UTC = Sun Oct 26 00:00:00 1997 AZT isdst=0 ...