Springing forward: Russia set for daylight saving

Russia is preparing to switch to summer time tonight by putting its clocks forward one hour. At 2 am local time on Sunday, clocks across the country will jump to 3 o'clock. Sunday will have only 23 hours but there'll be more daylight in the early evening.

The changeover will begin with Russia's easternmost territory of Chukotka and move westwards to Kaliningrad on the Baltic Sea through eleven time zones.

More than 110 countries adopt summer time for the better use of daylight.

However, doctors have mixed opinions about how harmful the change can be.