I'm asking for information to use in specifying time zone abbreviations for Belarus, Russia, and Ukraine.
For all three I can use:

1. References to government documents that specify time zone names or abbreviations.
2. References to government documents that specify whether current time is considered to be
   "standard" time or "saving" time.
3. References indicating what time zone names or abbreviations are actually in use in the areas.
4. References indicating whether people in the areas consider themselves to be on "standard" or "saving" time.

We do have this year's Decree #725...
       http://www.government.ru/gov/results/16355/print/
...for Russia; if translate.google.com is correct, Moscow is on "Eastern Standard Time" with most other
zones being "Eastern Standard Time plus n hours" and one zone being "Eastern Standard Time minus 1 hour."

                --ado