Summer time is the practice of moving clocks one hour forward to make better use of the longer daylight hours in the summer months. This creates opportunities for leisure activities or work during as it stays light for longer during the evening. However, energy savings are relatively small and some experts say summer time creates health problems.
How it works in Europe
Although the idea for summer time has often been credited to Benjamin Franklin, It is believed that Germany and Austria-Hungary where the first to embrace the concept a century ago to save fuel for the First World War. Others soon followed suit. Most EU member states adopted summer time in the 1970s.
However, having different beginning and end dates in every country created problems, especially for the transport sector. This is why governments decided at the EU level that summer time should begin on the last Sunday in March and end on the last Sunday in October.
Countries without summer time
Many countries might have adopted summer time, but there are also many that haven't, such as Russia, China and Japan. Check out our chart to see which countries observe it and when.
REF. : 20150325STO37722