Created attachment 173319 [details] date(1) compatibility matrix ============ (1) 11.0-BETA3 breaks compatibility with 10.3 and other OS, and violates posix [1](see below, and item (3)) $ LC_ALL=en_US.UTF-8 date FreeBSD 11.0-BETA3 : (wrong) Friday, August 5, 2016 at 03:20:25 PM CEST FreeBSD 10.3-RELEASE-p6 : (ok) Fri Aug 5 15:15:11 CEST 2016 OSX version 10.9.5 : (ok) Fri Aug 5 14:57:14 CEST 2016 Fedora Linux 4.6.4-301.fc24.x86_64 : (ok) Fri Aug 5 15:10:40 CEST 2016 Debian 8.0 / Linux 4.4.16-v7+ : (ok) Fri Aug 5 15:25:49 CEST 2016 ============ (2) missing day of the week name in es_ES locale $ LC_ALL=es_ES.UTF-8 date FreeBSD 11.0-BETA3 : 5 de agosto de 2016, 15:20:25 CEST FreeBSD 10.3-RELEASE-p6 : viernes, 5 de agosto de 2016, 15:15:11 CEST ============ (3) 11.0 and 10.3 violate Posix [1](see below), which states: When no formatting operand is specified, the output in the POSIX locale shall be equivalent to specifying: date "+%a %b %e %H:%M:%S %Z %Y" FreeBSD 11.0-BETA3 : $ LC_ALL=fr_FR.UTF-8 date vendredi 5 août 2016 15:20:25 CEST $ LC_ALL=fr_FR.UTF-8 date '+%a %b %e %H:%M:%S %Z %Y' ven. août 5 15:20:25 CEST 2016 FreeBSD 10.3-RELEASE-p6 : $ LC_ALL=fr_FR.UTF-8 date ven 5 aoû 2016 15:15:11 CEST $ LC_ALL=fr_FR.UTF-8 date '+%a %b %e %H:%M:%S %Z %Y' ven aoû 5 15:15:11 CEST 2016 OSX version 10.9.5 is similar to FreeBSD 10.3. Fedora Linux 4.6.4-301.fc24.x86_64 does it right for most (but not all) locales: $ LC_ALL=es_ES.UTF-8 date vie ago 5 15:10:40 CEST 2016 $ LC_ALL=es_ES.UTF-8 date '+%a %b %e %H:%M:%S %Z %Y' vie ago 5 15:10:40 CEST 2016 Debian 8.0 / Linux 4.4.16-v7+ does it right for the locales that I have tested (but possibly same as Fedora): $ LC_ALL=es_ES.UTF-8 date vie ago 5 15:25:49 CEST 2016 $ LC_ALL=es_ES.UTF-8 date +%a %b %e %H:%M:%S %Z %Y vie ago 5 15:25:49 CEST 2016 ======================= <ref>[1]</ref> http://pubs.opengroup.org/onlinepubs/9699919799/ The Open Group Base Specifications Issue 7 IEEE Std 1003.1, 2013 Edition When no formatting operand is specified, the output in the POSIX locale shall be equivalent to specifying: date "+%a %b %e %H:%M:%S %Z %Y" %a Locale's abbreviated weekday name. %b Locale's abbreviated month name. %e Day of the month as a decimal number [1,31] in a two-digit field with leading <space> character fill. %Z Timezone name, or no characters if no timezone is determinable. ======================= Attached is the full report.
POSIX cares of its own locale (POSIX or C) only, all other locales are free to do anything.