Time Zone Database Release 2017b
Released
Downloads
| File | Description |
|---|---|
 tzdb-2017b.tar.lz (382.1kb) |
Complete Distribution (Data, Code and Extras) |
| tzdata2017b.tar.gz (316.7kb) |
Data Only Distribution |
| tzcode2017b.tar.gz (205.8kb) |
Code Only Distribution |
Release Notes
Briefly: Haiti has resumed DST.
Changes to past and future timestamps
Haiti resumed observance of DST in 2017. (Thanks to Steffen Thorsen.)
Changes to past timestamps
Liberia changed from -004430 to +00 on 1972-01-07, not 1972-05-01.
Use "MMT" to abbreviate Liberia's time zone before 1972, as "-004430"
is one byte over the POSIX limit. (Problem reported by Derick Rethans.)
Changes to code
The reference localtime implementation now falls back on the
current US daylight-saving transition rules rather than the
1987-2006 rules. This fallback occurs only when (1) the TZ
environment variable has a value like "AST4ADT" that asks
for daylight saving time but does not specify the rules, (2) there
is no file by that name, and (3) the TZDEFRULES file cannot be
loaded. (Thanks to Tom Lane.)