illumos gate

Currently uptime printf 12-hour time no matter what locale is set:

# locale
LANG=en_US.UTF-8
LC_CTYPE="en_US.UTF-8" 
LC_NUMERIC="en_US.UTF-8" 
LC_TIME="en_US.UTF-8" 
LC_COLLATE="en_US.UTF-8" 
LC_MONETARY="en_US.UTF-8" 
LC_MESSAGES="en_US.UTF-8" 
LC_ALL=

# uptime 
 7:41pm  up 17:37,  2 users,  load average: 1.49, 1.36, 1.23

# locale
LANG=ru_RU.UTF-8
LC_CTYPE="ru_RU.UTF-8" 
LC_NUMERIC="ru_RU.UTF-8" 
LC_TIME="ru_RU.UTF-8" 
LC_COLLATE="ru_RU.UTF-8" 
LC_MONETARY="ru_RU.UTF-8" 
LC_MESSAGES="ru_RU.UTF-8" 
LC_ALL=

# uptime 
  7:17после полудня  up 17:13,  2 users,  load average: 1,61, 1,41, 1,25

It is very urgly for Russian.

The time format is hardcoded in illumos-gate/usr/src/cmd/w/w.c(prtat)

GNU uptime from coreutils respects locale settings