Daylight saving time
The 2011 declaration by Russia that it would not turn its clocks back and stay in DST all year long was subsequently followed by a similar declaration from Belarus. The plan generated widespread complaints due to the dark of wintertime morning, and thus was abandoned in 2014. The country changed its clocks to Standard Time on 26 October 2014 - and intends to stay there permanently.

Q: Which season's dark mornings led to people complaining about the switch from DST?
winter