Winter time will begin in Hungary on Sunday, October 28, when clocks at 3am are set back an hour. Power transmission system operator Mavir estimates that switching to summer time saves enough electricity to meet demand for a medium-sized town. Last year, 80 GWh energy was saved thanks to changing the clocks, Mavir figures show. Hungary adopted the light- and energysaving measure back in 1980. Under a 1996 government decree, summer time begins on the last Sunday of March and ends on the last Sunday of October.