Double change on Apr 4th in America/Bahia_Banderas?

[Stuart Bishop]

Just looking into a failure in my test suite triggered by two timezone
jumps within an hour:

$ zdump -v America/Bahia_Banderas 2010 | grep 2010
America/Bahia_Banderas  Sun Apr  4 06:59:59 2010 UTC = Sat Apr  3
23:59:59 2010 MST isdst=0 gmtoff=-25200
America/Bahia_Banderas  Sun Apr  4 07:00:00 2010 UTC = Sun Apr  4
01:00:00 2010 CST isdst=0 gmtoff=-21600
America/Bahia_Banderas  Sun Apr  4 07:59:59 2010 UTC = Sun Apr  4
01:59:59 2010 CST isdst=0 gmtoff=-21600
America/Bahia_Banderas  Sun Apr  4 08:00:00 2010 UTC = Sun Apr  4
03:00:00 2010 CDT isdst=1 gmtoff=-18000
America/Bahia_Banderas  Sun Oct 31 06:59:59 2010 UTC = Sun Oct 31
01:59:59 2010 CDT isdst=1 gmtoff=-18000
America/Bahia_Banderas  Sun Oct 31 07:00:00 2010 UTC = Sun Oct 31
01:00:00 2010 CST isdst=0 gmtoff=-21600

Is this really correct, or should the timezone have jumped straight to
CDT (-18000) at 0700 UTC?

-- 
Stuart Bishop <stuart at stuartbishop.net>
http://www.stuartbishop.net/