Re: [tz] zic changes (2/2)

The TZ string "PST+8PDT" doesn't conform to POSIX, and it isn't the name of a tzdata file. Traditionally the GNU C library attempts to interpret ruleless TZ strings by applying the daylight-saving rules of the GNU project headquarters in Cambridge, MA. It does this by combining the specified UTC offset (here, -08) with the DST rules taken from the file "America/New_York". Apparently this combination isn't working for the new-format tzdata files. My guess is that it's a glibc bug but I haven't investigated the details. You might also try using a valid POSIX string, or a valid tzdata string, and checking whether the bug also occurs in these more-important cases.