"欧洲/莫斯科"时区的别名是"W-SU".它代表什么？

Question

猜测:a)"SU"代表苏联; b)"W"代表西方

彻底的互联网搜索没有帮助.

Answer 1

截至今天，谷歌搜索发现了这些链接和其他链接：

"Country code(s)    TZ database name    Area(s) covered    Type    UTC offset        Time zone       Source file    Notes
...
                                                                   STD     DST       abbreviation
RU                 W-SU                <blank>            Link     +03:00  +03:00    MSK             backward        Link to Europe/Moscow
..."
--https://en.wikipedia.org/wiki/List_of_tz_database_time_zones


"...    
The current W-SU time zone offset is:
UTC/GMT +3 hours    
...
This time zone does not change for daylight savings.    
...    
Time zones in MSD, MSK
Europe/Moscow"
--https://www.travelmath.com/time-zone/W-SU

它也在 TZ DB 中：

Mac_3.2.57$find . -type f -exec grep -Hn 'W-SU'  {} \;
./backward:127:Link Europe/Moscow       W-SU
./frickenAll:15370:Link Europe/Moscow       W-SU
Mac_3.2.57$cat backward | head -n 137 | tail -n 20
Link    America/New_York    US/Eastern
Link    Pacific/Honolulu    US/Hawaii
Link    America/Indiana/Knox    US/Indiana-Starke
Link    America/Detroit     US/Michigan
Link    America/Denver      US/Mountain
Link    America/Los_Angeles US/Pacific
Link    Pacific/Pago_Pago   US/Samoa
Link    Etc/UTC         UTC
Link    Etc/UTC         Universal
Link    Europe/Moscow       W-SU
Link    Etc/UTC         Zulu


# Two-part names that were renamed mostly to three-part names in 1995

# Link  TARGET              LINK-NAME   #= TARGET1
Link    America/Argentina/Buenos_Aires  America/Buenos_Aires
Link    America/Argentina/Catamarca America/Catamarca
Link    America/Argentina/Cordoba   America/Cordoba
Link    America/Indiana/Indianapolis    America/Indianapolis
Mac_3.2.57$