On Tue, Aug 23, 2016 at 7:55 PM, Paul Eggert <eggert@cs.ucla.edu> wrote:
>
> +    ...  For Europe/Moscow the
> +    invented abbreviation MSM was replaced by +05, whereas MSK and MSD
> +    were kept as they are not our invention and are widely used.

What's the difference between MSM (Midsummer) and MDST (Moscow Double Summer Time)?  Both seem to be +05 = MSK + 2, but got different abbreviations.

BTW, the earlier Soviet decrees have been collected on the istmat.info web site.  For example, (transition date: url):

Dec 28, 1917: http://istmat.info/node/28137
May 31, 1918: http://istmat.info/node/30001
May 31, 1919: http://istmat.info/node/37949
Feb 14, 1921: http://istmat.info/node/45840
May 20, 1921: http://istmat.info/node/45949

You may want to reference these documents in the source files.