[tz] Astrakhan region got approval to change its time zone

[Paul Eggert]

Arthur David Olson wrote:
> "LST" (Local Standard Time) (in some cases, in
> conjunction with "LDT") could used for all those (new) cases where an
> abbreviation isn't known.

This would be less useful for traditional time stamps. For example, the output 
of successive invocations of POSIX 'date' in the C locale in Astrakhan might 
look like this:

Tue Jul  1 12:31:27 LST 2014
Mon Feb 15 03:18:46 LST 2016
Sat Jul  1 23:51:21 LST 2017

and information about the UT offset would be lost. In contrast, using +NN would 
case 'date' output to look like this:

Tue Jul  1 12:31:27 +04 2014
Mon Feb 15 03:18:46 +03 2016
Sat Jul  1 23:51:21 +04 2017

and the UT offset info would be available.