We usually refer to Moscow time, even speaking about events on Earth's orbit. No one cares about what UTC is. If you want to link your local time to another person's time, you would ask: "какая у вас разница с Москвой?" Then the answer "Один час" would mean, that their clock are 2 hours behind mine.

Departure times are specified in terms of local time, except intercity trains, which use Moscow time.

BTW, we changed time couple years ago, and now live in the darkness. October-January was a total nightmare. Not sure I survive the next winter.
The government continues experiments with time zones, which drives mad computer and gadgets.